fkie_cve-2021-29155
Vulnerability from fkie_nvd
Published
2021-04-20 16:15
Modified
2024-11-21 06:00
Severity ?
Summary
An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
linux | linux_kernel | * | |
fedoraproject | fedora | 32 | |
fedoraproject | fedora | 33 | |
fedoraproject | fedora | 34 | |
debian | debian_linux | 9.0 |
{ configurations: [ { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", matchCriteriaId: "771B94BF-4271-41B0-84CB-3BB143571BFD", versionEndExcluding: "5.11.16", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", matchCriteriaId: "36D96259-24BD-44E2-96D9-78CE1D41F956", vulnerable: true, }, { criteria: "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", matchCriteriaId: "E460AA51-FCDA-46B9-AE97-E6676AA5E194", vulnerable: true, }, { criteria: "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", matchCriteriaId: "A930E247-0B43-43CB-98FF-6CE7B8189835", 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, }, ], negate: false, operator: "OR", }, ], }, ], cveTags: [], descriptions: [ { lang: "en", value: "An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer arithmetic operations, the pointer modification performed by the first operation is not correctly accounted for when restricting subsequent operations.", }, { lang: "es", value: "Se detectó un problema en el kernel de Linux versiones hasta 5.11.x. En el archivo kernel/bpf/verifier.c lleva a cabo especulaciones indeseables fuera de límites en la aritmética de punteros, conllevando a ataques de canal lateral que anulan las mitigaciones de Spectre y consiguen información confidencial de la memoria del kernel. Específicamente, para secuencias de operaciones aritméticas de puntero, la modificación de puntero llevada a cabo por la primera operación no se contabiliza correctamente al restringir operaciones posteriores", }, ], id: "CVE-2021-29155", lastModified: "2024-11-21T06:00:47.837", 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: "2021-04-20T16:15:10.547", references: [ { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073815b756c51ba9d8384d924c5d1c03ca3d1ae4", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=24c109bb1537c12c02aeed2d51a347b4d6a9b76e", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6f55b2f2a1178856c19bbce2f71449926e731914", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7fedb63a8307dda0ec3b8969a3b233a1dd7ea8e0", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9601148392520e2e134936e76788fc2a6371e7be", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6aaece00a57fa6f22575364b3903dfbccf5345d", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b658bbb844e28f1862867f37e8ca11a8e2aa94a3", }, { source: "cve@mitre.org", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f528819334881fd622fdadeddb3f7edaed8b7c9b", }, { source: "cve@mitre.org", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html", }, { source: "cve@mitre.org", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/", }, { source: "cve@mitre.org", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/", }, { source: "cve@mitre.org", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/", }, { source: "cve@mitre.org", tags: [ "Vendor Advisory", ], url: "https://www.kernel.org", }, { source: "cve@mitre.org", tags: [ "Mailing List", "Patch", "Third Party Advisory", ], url: "https://www.openwall.com/lists/oss-security/2021/04/18/4", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073815b756c51ba9d8384d924c5d1c03ca3d1ae4", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=24c109bb1537c12c02aeed2d51a347b4d6a9b76e", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6f55b2f2a1178856c19bbce2f71449926e731914", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7fedb63a8307dda0ec3b8969a3b233a1dd7ea8e0", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9601148392520e2e134936e76788fc2a6371e7be", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a6aaece00a57fa6f22575364b3903dfbccf5345d", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b658bbb844e28f1862867f37e8ca11a8e2aa94a3", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f528819334881fd622fdadeddb3f7edaed8b7c9b", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Vendor Advisory", ], url: "https://www.kernel.org", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Mailing List", "Patch", "Third Party Advisory", ], url: "https://www.openwall.com/lists/oss-security/2021/04/18/4", }, ], sourceIdentifier: "cve@mitre.org", vulnStatus: "Modified", weaknesses: [ { description: [ { lang: "en", value: "CWE-125", }, ], source: "nvd@nist.gov", type: "Primary", }, ], }
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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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