{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-34693", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-04T00:19:48.108Z", "dateReserved": "2021-06-14T00:00:00.000Z", "datePublished": "2021-06-14T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2024-03-25T00:40:28.345Z"}, "descriptions": [{"lang": "en", "value": "net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/"}, {"name": "[oss-security] 20210615 CVE-2021-34693: Infoleak in CAN BCM protocol in Linux kernel", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/06/15/1"}, {"name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"}, {"name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"}, {"name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"}, {"name": "DSA-4941", "tags": ["vendor-advisory"], "url": "https://www.debian.org/security/2021/dsa-4941"}, {"url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:19:48.108Z"}, "title": "CVE Program Container", "references": [{"url": "https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/", "tags": ["x_transferred"]}, {"name": "[oss-security] 20210615 CVE-2021-34693: Infoleak in CAN BCM protocol in Linux kernel", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/06/15/1"}, {"name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"}, {"name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"}, {"name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"}, {"name": "DSA-4941", "tags": ["vendor-advisory", "x_transferred"], "url": "https://www.debian.org/security/2021/dsa-4941"}, {"url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc", "tags": ["x_transferred"]}]}]}}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FB436BB5-8E76-4DF6-893D-9C7F35431F39", "versionEndIncluding": "5.12.10", "versionStartIncluding": "2.6.25", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized."}, {"lang": "es", "value": "El archivo net/can/bcm.c en el kernel de Linux versiones hasta 5.12.10, permite a usuarios locales obtener informaci\u00f3n confidencial de la memoria de la pila del kernel porque partes de una estructura de datos no est\u00e1n inicializadas"}], "id": "CVE-2021-34693", "lastModified": "2026-06-17T03:56:22.020", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-06-14T22:15:20.820", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/06/15/1"}, {"source": "cve@mitre.org", "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"}, {"source": "cve@mitre.org", "url": "https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4941"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/06/15/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4941"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-909"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: allows local users to obtain sensitive information from stack memory because of uninitialized data structure in net/can/bcm.c", "id": "1972265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1972265"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-665->CWE-200", "details": ["net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized.", "The canbus filesystem in the Linux kernel contains an information leak of kernel memory to devices on the CAN bus network link layer. An attacker with the ability to dump messages on the CAN bus is able to learn of uninitialized stack values by dumbing messages on the can bus."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2021-34693", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-06-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-34693\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-34693"], "threat_severity": "Moderate"}