gsd-2020-27170
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
An issue was discovered in the Linux kernel before 5.11.8. 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, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.
Aliases
Aliases
CVE-2020-27170


To clipboard 

{
   GSD: {
      alias: "CVE-2020-27170",
      description: "An issue was discovered in the Linux kernel before 5.11.8. 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, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.",
      id: "GSD-2020-27170",
      references: [
         "https://www.suse.com/security/cve/CVE-2020-27170.html",
         "https://access.redhat.com/errata/RHSA-2021:2316",
         "https://access.redhat.com/errata/RHSA-2021:2314",
         "https://ubuntu.com/security/CVE-2020-27170",
         "https://advisories.mageia.org/CVE-2020-27170.html",
         "https://security.archlinux.org/CVE-2020-27170",
         "https://linux.oracle.com/cve/CVE-2020-27170.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2020-27170",
         ],
         details: "An issue was discovered in the Linux kernel before 5.11.8. 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, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.",
         id: "GSD-2020-27170",
         modified: "2023-12-13T01:22:11.442860Z",
         schema_version: "1.4.0",
      },
   },
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                              version: {
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      },
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         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "MEDIUM",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 1.9,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "NONE",
                  vectorString: "AV:L/AC:M/Au:N/C:P/I:N/A:N",
                  version: "2.0",
               },
               exploitabilityScore: 3.4,
               impactScore: 2.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "LOW",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  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,
            },
         },
         lastModifiedDate: "2022-07-30T03:46Z",
         publishedDate: "2021-03-20T22:15Z",
      },
   },
}


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