{"containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules", "vendor": "Rockwell Automation", "versions": [{"status": "affected", "version": "All"}]}, {"defaultStatus": "unaffected", "product": "CompactLogix L32E and L35E controllers", "vendor": "Rockwell Automation", "versions": [{"status": "affected", "version": "All"}]}, {"defaultStatus": "unaffected", "product": "1788-ENBT FLEXLogix adapter", "vendor": "Rockwell Automation", "versions": [{"status": "affected", "version": "All"}]}, {"defaultStatus": "unaffected", "product": "1794-AENTR FLEX I/O EtherNet/IP adapter", "vendor": "Rockwell Automation", "versions": [{"status": "affected", "version": "All"}]}, {"defaultStatus": "unaffected", "product": "ControlLogix, CompactLogix, GuardLogix, and SoftLogix", "vendor": "Rockwell Automation", "versions": [{"lessThanOrEqual": "18", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "CompactLogix and SoftLogix controllers", "vendor": "Rockwell Automation", "versions": [{"lessThanOrEqual": "19", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "ControlLogix and GuardLogix controllers", "vendor": "Rockwell Automation", "versions": [{"lessThanOrEqual": "20", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "MicroLogix", "vendor": "Rockwell Automation", "versions": [{"status": "affected", "version": "1100"}, {"status": "affected", "version": "1400"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Rub\u00e9n Santamarta of IOActive identified vulnerabilities in Rockwell Automation\u2019s ControlLogix PLC and released proof-of-concept (exploit) code at the Digital Bond S4 Conference on January 19, 2012."}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>\n\n\n<span style=\"background-color: rgb(255, 255, 255);\">\n\n\n\n\n\n<span style=\"background-color: rgb(255, 255, 255);\">\n\n<span style=\"background-color: rgb(255, 255, 255);\">The device does not properly validate the data being sent to the buffer. An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the CPU to crash. Successful exploitation of this vulnerability could cause loss of availability and a disruption in communications with other connected devices.</span>\n\n</span>\n\n</span>\n\n</p><p>Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400&nbsp;<br></p>"}], "value": "The device does not properly validate the data being sent to the buffer. An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the CPU to crash. Successful exploitation of this vulnerability could cause loss of availability and a disruption in communications with other connected devices.\n\n\n\n\n\n\n\nRockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400"}], "metrics": [{"cvssV2_0": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-119", "description": "CWE-119", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2025-06-30T21:59:03.474Z"}, "references": [{"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03"}, {"url": "https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154"}, {"url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155"}, {"url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156"}, {"url": "http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102"}], "solutions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>According to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration.</p><p>To mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell\u2019s Advisories at:</p><p><a target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154\">https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154</a><br><a target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155\">https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155</a><br><a target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156\">https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156</a></p><p>For more information on security with Rockwell Automation products, please refer to <a target=\"_blank\" rel=\"nofollow\" href=\"http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102\">Rockwell\u2019s Security Advisory Index</a>.</p><br>"}], "value": "According to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration.\n\nTo mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell\u2019s Advisories at:\n\n https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154 \n https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155 \n https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156 \n\nFor more information on security with Rockwell Automation products, please refer to Rockwell\u2019s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 ."}], "source": {"advisory": "ICSA-13-011-03", "discovery": "EXTERNAL"}, "title": "Rockwell Automation ControlLogix PLC Improper Input Validation", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Rockwell recommends updating to the newest firmware patches to fix the vulnerabilities, but if not able to do so right away, then Rockwell advises immediately employing the following mitigations for each of the affected products.</p><p>To mitigate the vulnerabilities pertaining to receiving valid CIP packets:</p><ol><li>Block all traffic to the Ethernet/IP or other CIP protocol-based devices from outside the Manufacturing Zone by restricting or blocking access to TCP and UDP Ports 2222 and 44818 using appropriate security technology such as a firewall or Unified Threat Management (UTM).</li><li>Employ a UTM appliance that specifically supports CIP message filtering.</li></ol>\n\n<p>In addition to the above, Rockwell recommends concerned customers remain vigilant and continue to follow security strategies that help reduce risk and enhance overall control system security. Where possible, they suggest you apply multiple recommendations and complement this list with your own best-practices:</p><ol><li>Employ layered security and defense-in-depth methods in system design to restrict and control access to individual products and control networks. Refer to <a target=\"_blank\" rel=\"nofollow\" href=\"http://www.ab.com/networks/architectures.html\">http://www.ab.com/networks/architectures.html</a> for comprehensive information about implementing validated architectures designed to deliver these measures.</li><li>Restrict physical and electronic access to automation products, networks, and systems to only those individuals authorized to be in contact with control system equipment.</li><li>Employ firewalls with ingress/egress filtering, intrusion detection/prevention systems, and validate all configurations. Evaluate firewall configurations to ensure other appropriate inbound and outbound traffic is blocked.</li><li>Use up-to-date end-point protection software (e.g., antivirus/antimalware software) on all PC-based assets.</li><li>Make sure that software and control system device firmware is patched to current releases.</li><li>Periodically change passwords in control system components and infrastructure devices.</li><li>Where applicable, set the controller key-switch/mode-switch to RUN mode.</li></ol>\n\n\n\n<span style=\"background-color: rgb(255, 255, 255);\">For more information on security with Rockwell Automation products, please refer to </span><a target=\"_blank\" rel=\"nofollow\" href=\"http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102\">Rockwell\u2019s Security Advisory Index</a><span style=\"background-color: rgb(255, 255, 255);\">.</span>\n\n<br>"}], "value": "Rockwell recommends updating to the newest firmware patches to fix the vulnerabilities, but if not able to do so right away, then Rockwell advises immediately employing the following mitigations for each of the affected products.\n\nTo mitigate the vulnerabilities pertaining to receiving valid CIP packets:\n\n * Block all traffic to the Ethernet/IP or other CIP protocol-based devices from outside the Manufacturing Zone by restricting or blocking access to TCP and UDP Ports 2222 and 44818 using appropriate security technology such as a firewall or Unified Threat Management (UTM).\n * Employ a UTM appliance that specifically supports CIP message filtering.\n\n\nIn addition to the above, Rockwell recommends concerned customers remain vigilant and continue to follow security strategies that help reduce risk and enhance overall control system security. Where possible, they suggest you apply multiple recommendations and complement this list with your own best-practices:\n\n * Employ layered security and defense-in-depth methods in system design to restrict and control access to individual products and control networks. Refer to http://www.ab.com/networks/architectures.html for comprehensive information about implementing validated architectures designed to deliver these measures.\n * Restrict physical and electronic access to automation products, networks, and systems to only those individuals authorized to be in contact with control system equipment.\n * Employ firewalls with ingress/egress filtering, intrusion detection/prevention systems, and validate all configurations. Evaluate firewall configurations to ensure other appropriate inbound and outbound traffic is blocked.\n * Use up-to-date end-point protection software (e.g., antivirus/antimalware software) on all PC-based assets.\n * Make sure that software and control system device firmware is patched to current releases.\n * Periodically change passwords in control system components and infrastructure devices.\n * Where applicable, set the controller key-switch/mode-switch to RUN mode.\n\n\n\n\nFor more information on security with Rockwell Automation products, please refer to Rockwell\u2019s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 ."}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "ics-cert@hq.dhs.gov", "ID": "CVE-2012-6439", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400 allow remote attackers to cause a denial of service (control and communication outage) via a CIP message that modifies the (1) configuration or (2) network parameters."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf", "refsource": "MISC", "url": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T21:28:39.998Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf"}]}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-06-03T13:40:25.252695Z", "id": "CVE-2012-6436", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-03T13:40:40.645Z"}}]}, "cveMetadata": {"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "assignerShortName": "icscert", "cveId": "CVE-2012-6436", "datePublished": "2013-01-24T21:00:00.000Z", "dateReserved": "2012-12-26T00:00:00.000Z", "dateUpdated": "2026-06-03T13:40:40.645Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T21:28:39.998Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2012-6436", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-03T13:40:25.252695Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-03T13:40:37.484Z"}}], "cna": {"title": "Rockwell Automation ControlLogix PLC Improper Input Validation", "source": {"advisory": "ICSA-13-011-03", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Rub\u00e9n Santamarta of IOActive identified vulnerabilities in Rockwell Automation\u2019s ControlLogix PLC and released proof-of-concept (exploit) code at the Digital Bond S4 Conference on January 19, 2012."}], "metrics": [{"format": "CVSS", "cvssV2_0": {"version": "2.0", "baseScore": 7.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Rockwell Automation", "product": "1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules", "versions": [{"status": "affected", "version": "All"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "CompactLogix L32E and L35E controllers", "versions": [{"status": "affected", "version": "All"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "1788-ENBT FLEXLogix adapter", "versions": [{"status": "affected", "version": "All"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "1794-AENTR FLEX I/O EtherNet/IP adapter", "versions": [{"status": "affected", "version": "All"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "ControlLogix, CompactLogix, GuardLogix, and SoftLogix", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "18"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "CompactLogix and SoftLogix controllers", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "19"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "ControlLogix and GuardLogix controllers", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "20"}], "defaultStatus": "unaffected"}, {"vendor": "Rockwell Automation", "product": "MicroLogix", "versions": [{"status": "affected", "version": "1100"}, {"status": "affected", "version": "1400"}], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "According to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration.\n\nTo mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell\u2019s Advisories at:\n\n https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154 \n https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155 \n https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156 \n\nFor more information on security with Rockwell Automation products, please refer to Rockwell\u2019s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 .", "supportingMedia": [{"type": "text/html", "value": "<p>According to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration.</p><p>To mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell\u2019s Advisories at:</p><p><a target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154\">https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154</a><br><a target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155\">https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155</a><br><a target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156\">https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156</a></p><p>For more information on security with Rockwell Automation products, please refer to <a target=\"_blank\" rel=\"nofollow\" href=\"http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102\">Rockwell\u2019s Security Advisory Index</a>.</p><br>", "base64": false}]}], "references": [{"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03"}, {"url": "https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154"}, {"url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155"}, {"url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156"}, {"url": "http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102"}], "workarounds": [{"lang": "en", "value": "Rockwell recommends updating to the newest firmware patches to fix the vulnerabilities, but if not able to do so right away, then Rockwell advises immediately employing the following mitigations for each of the affected products.\n\nTo mitigate the vulnerabilities pertaining to receiving valid CIP packets:\n\n * Block all traffic to the Ethernet/IP or other CIP protocol-based devices from outside the Manufacturing Zone by restricting or blocking access to TCP and UDP Ports 2222 and 44818 using appropriate security technology such as a firewall or Unified Threat Management (UTM).\n * Employ a UTM appliance that specifically supports CIP message filtering.\n\n\nIn addition to the above, Rockwell recommends concerned customers remain vigilant and continue to follow security strategies that help reduce risk and enhance overall control system security. Where possible, they suggest you apply multiple recommendations and complement this list with your own best-practices:\n\n * Employ layered security and defense-in-depth methods in system design to restrict and control access to individual products and control networks. Refer to http://www.ab.com/networks/architectures.html for comprehensive information about implementing validated architectures designed to deliver these measures.\n * Restrict physical and electronic access to automation products, networks, and systems to only those individuals authorized to be in contact with control system equipment.\n * Employ firewalls with ingress/egress filtering, intrusion detection/prevention systems, and validate all configurations. Evaluate firewall configurations to ensure other appropriate inbound and outbound traffic is blocked.\n * Use up-to-date end-point protection software (e.g., antivirus/antimalware software) on all PC-based assets.\n * Make sure that software and control system device firmware is patched to current releases.\n * Periodically change passwords in control system components and infrastructure devices.\n * Where applicable, set the controller key-switch/mode-switch to RUN mode.\n\n\n\n\nFor more information on security with Rockwell Automation products, please refer to Rockwell\u2019s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 .", "supportingMedia": [{"type": "text/html", "value": "<p>Rockwell recommends updating to the newest firmware patches to fix the vulnerabilities, but if not able to do so right away, then Rockwell advises immediately employing the following mitigations for each of the affected products.</p><p>To mitigate the vulnerabilities pertaining to receiving valid CIP packets:</p><ol><li>Block all traffic to the Ethernet/IP or other CIP protocol-based devices from outside the Manufacturing Zone by restricting or blocking access to TCP and UDP Ports 2222 and 44818 using appropriate security technology such as a firewall or Unified Threat Management (UTM).</li><li>Employ a UTM appliance that specifically supports CIP message filtering.</li></ol>\n\n<p>In addition to the above, Rockwell recommends concerned customers remain vigilant and continue to follow security strategies that help reduce risk and enhance overall control system security. Where possible, they suggest you apply multiple recommendations and complement this list with your own best-practices:</p><ol><li>Employ layered security and defense-in-depth methods in system design to restrict and control access to individual products and control networks. Refer to <a target=\"_blank\" rel=\"nofollow\" href=\"http://www.ab.com/networks/architectures.html\">http://www.ab.com/networks/architectures.html</a> for comprehensive information about implementing validated architectures designed to deliver these measures.</li><li>Restrict physical and electronic access to automation products, networks, and systems to only those individuals authorized to be in contact with control system equipment.</li><li>Employ firewalls with ingress/egress filtering, intrusion detection/prevention systems, and validate all configurations. Evaluate firewall configurations to ensure other appropriate inbound and outbound traffic is blocked.</li><li>Use up-to-date end-point protection software (e.g., antivirus/antimalware software) on all PC-based assets.</li><li>Make sure that software and control system device firmware is patched to current releases.</li><li>Periodically change passwords in control system components and infrastructure devices.</li><li>Where applicable, set the controller key-switch/mode-switch to RUN mode.</li></ol>\n\n\n\n<span style=\"background-color: rgb(255, 255, 255);\">For more information on security with Rockwell Automation products, please refer to </span><a target=\"_blank\" rel=\"nofollow\" href=\"http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102\">Rockwell\u2019s Security Advisory Index</a><span style=\"background-color: rgb(255, 255, 255);\">.</span>\n\n<br>", "base64": false}]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "The device does not properly validate the data being sent to the buffer. An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the CPU to crash. Successful exploitation of this vulnerability could cause loss of availability and a disruption in communications with other connected devices.\n\n\n\n\n\n\n\nRockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400", "supportingMedia": [{"type": "text/html", "value": "<p>\n\n\n<span style=\"background-color: rgb(255, 255, 255);\">\n\n\n\n\n\n<span style=\"background-color: rgb(255, 255, 255);\">\n\n<span style=\"background-color: rgb(255, 255, 255);\">The device does not properly validate the data being sent to the buffer. An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the CPU to crash. Successful exploitation of this vulnerability could cause loss of availability and a disruption in communications with other connected devices.</span>\n\n</span>\n\n</span>\n\n</p><p>Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400&nbsp;<br></p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-119", "description": "CWE-119"}]}], "providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2025-06-30T21:59:03.474Z"}, "x_legacyV4Record": {"affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "n/a"}]}, "product_name": "n/a"}]}, "vendor_name": "n/a"}]}}, "data_type": "CVE", "references": {"reference_data": [{"url": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf", "name": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400 allow remote attackers to cause a denial of service (control and communication outage) via a CIP message that modifies the (1) configuration or (2) network parameters."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2012-6439", "STATE": "PUBLIC", "ASSIGNER": "ics-cert@hq.dhs.gov"}}}}, "cveMetadata": {"cveId": "CVE-2012-6436", "state": "PUBLISHED", "dateUpdated": "2026-06-03T13:40:40.645Z", "dateReserved": "2012-12-26T00:00:00.000Z", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "datePublished": "2013-01-24T21:00:00.000Z", "assignerShortName": "icscert"}, "dataVersion": "5.2"}

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An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the CPU to crash. Successful exploitation of this vulnerability could cause loss of availability and a disruption in communications with other connected devices.\n\n\n\n\n\n\n\nRockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400"}, {"lang": "es", "value": "Desbordamiento de b\u00fafer en varios productos Rockwell Automation EtherNet/IP; 1756-ENBT, 1756-EWEB, 1768-ENBT, y 1768-EWEB; controladores CompactLogix L32E y L35E; adaptodor 1788-ENBT FLEXLogix; adaptador 1794-AENTR FLEX I/O EtherNet/IP; ControlLogix 18 y anteriores; CompactLogix 18 y anteriores; GuardLogix 18 y anteriores; SoftLogix 18 y anteriores; CompactLogix 19 y anteriores; SoftLogix 19 y anteriores; ControlLogix 20 y anteriores; GuardLogix 20 y anteriores; y MicroLogix 1100 y 1400, permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda de CPU y agotamiento de la comunicaci\u00f3n) a trav\u00e9s de un paquete CIP mal formado."}], "id": "CVE-2012-6436", "lastModified": "2026-06-03T14:16:17.223", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "ics-cert@hq.dhs.gov", "type": "Secondary", "userInteractionRequired": false}, {"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2013-01-24T21:55:01.477", "references": [{"source": "ics-cert@hq.dhs.gov", "url": "http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102"}, {"source": "ics-cert@hq.dhs.gov", "url": "https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154"}, {"source": "ics-cert@hq.dhs.gov", "url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155"}, {"source": "ics-cert@hq.dhs.gov", "url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156"}, {"source": "ics-cert@hq.dhs.gov", "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["US Government Resource"], "url": "http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf"}], "sourceIdentifier": "ics-cert@hq.dhs.gov", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "ics-cert@hq.dhs.gov", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

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