fkie_cve-2021-33624
Vulnerability from fkie_nvd
Published
2021-06-23 16:15
Modified
2024-11-21 06:09
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
References
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2021/06/21/1Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttps://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49dbPatch, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlIssue Tracking, Third Party Advisory
cve@mitre.orghttps://www.usenix.org/conference/usenixsecurity21/presentation/kirznerThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/06/21/1Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49dbPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlIssue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.usenix.org/conference/usenixsecurity21/presentation/kirznerThird Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
debian debian_linux 9.0


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "4C096241-6457-4DB4-80C3-DD650F628184",
                     versionEndExcluding: "5.12.13",
                     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: "In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.",
      },
      {
         lang: "es",
         value: "En el archivo kernel/bpf/verifier.c en el kernel de Linux versiones anteriores a 5.12.13, una rama puede ser mal predicha (por ejemplo, debido a la confusión de tipos) y, en consecuencia, un programa BPF no privilegiado puede leer ubicaciones de memoria arbitrarias por medio de un ataque de canal lateral, también conocido como CID-9183671af6db",
      },
   ],
   id: "CVE-2021-33624",
   lastModified: "2024-11-21T06:09:13.043",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "MEDIUM",
            cvssData: {
               accessComplexity: "MEDIUM",
               accessVector: "LOCAL",
               authentication: "NONE",
               availabilityImpact: "NONE",
               baseScore: 4.7,
               confidentialityImpact: "COMPLETE",
               integrityImpact: "NONE",
               vectorString: "AV:L/AC:M/Au:N/C:C/I:N/A:N",
               version: "2.0",
            },
            exploitabilityScore: 3.4,
            impactScore: 6.9,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "HIGH",
               attackVector: "LOCAL",
               availabilityImpact: "NONE",
               baseScore: 4.7,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "HIGH",
               integrityImpact: "NONE",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
               version: "3.1",
            },
            exploitabilityScore: 1,
            impactScore: 3.6,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2021-06-23T16:15:07.957",
   references: [
      {
         source: "cve@mitre.org",
         tags: [
            "Exploit",
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/06/21/1",
      },
      {
         source: "cve@mitre.org",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db",
      },
      {
         source: "cve@mitre.org",
         tags: [
            "Issue Tracking",
            "Third Party Advisory",
         ],
         url: "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html",
      },
      {
         source: "cve@mitre.org",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/06/21/1",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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            "Third Party Advisory",
         ],
         url: "https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Issue Tracking",
            "Third Party Advisory",
         ],
         url: "https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner",
      },
   ],
   sourceIdentifier: "cve@mitre.org",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-843",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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