gsd-2021-36087
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.
Aliases
Aliases
{ GSD: { alias: "CVE-2021-36087", description: "The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.", id: "GSD-2021-36087", references: [ "https://www.suse.com/security/cve/CVE-2021-36087.html", "https://access.redhat.com/errata/RHSA-2021:4513", "https://ubuntu.com/security/CVE-2021-36087", "https://linux.oracle.com/cve/CVE-2021-36087.html", ], }, gsd: { metadata: { exploitCode: "unknown", remediation: "unknown", reportConfidence: "confirmed", type: "vulnerability", }, osvSchema: { aliases: [ "CVE-2021-36087", ], details: "The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.", id: "GSD-2021-36087", modified: "2023-12-13T01:23:16.562307Z", schema_version: "1.4.0", }, }, namespaces: { "cve.org": { CVE_data_meta: { ASSIGNER: "cve@mitre.org", ID: "CVE-2021-36087", 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: "The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.", }, ], }, problemtype: { problemtype_data: [ { description: [ { lang: "eng", value: "n/a", }, ], }, ], }, references: { reference_data: [ { name: "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml", refsource: "MISC", url: "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml", }, { name: "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675", refsource: "MISC", url: "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675", }, { name: "https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ@mail.gmail.com/T/", refsource: "MISC", url: "https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ@mail.gmail.com/T/", }, { name: "https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521", refsource: "MISC", url: "https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521", }, { name: "FEDORA-2021-67efe88c29", refsource: "FEDORA", url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/", }, ], }, }, "nvd.nist.gov": { configurations: { CVE_data_version: "4.0", nodes: [ { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:o:selinux_project:selinux:3.2:*:*:*:*:*:*:*", cpe_name: [], vulnerable: true, }, ], operator: "OR", }, { children: [], cpe_match: [ { cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", cpe_name: [], vulnerable: true, }, ], operator: "OR", }, ], }, cve: { CVE_data_meta: { ASSIGNER: "cve@mitre.org", ID: "CVE-2021-36087", }, data_format: "MITRE", data_type: "CVE", data_version: "4.0", description: { description_data: [ { lang: "en", value: "The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.", }, ], }, problemtype: { problemtype_data: [ { description: [ { lang: "en", value: "CWE-125", }, ], }, ], }, references: { reference_data: [ { name: "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml", refsource: "MISC", tags: [ "Third Party Advisory", ], url: "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml", }, { name: "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675", refsource: "MISC", tags: [ "Exploit", "Issue Tracking", "Patch", "Third Party Advisory", ], url: "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675", }, { name: "https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ@mail.gmail.com/T/", refsource: "MISC", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ@mail.gmail.com/T/", }, { name: "https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521", refsource: "MISC", tags: [ "Patch", "Third Party Advisory", ], url: "https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521", }, { name: "FEDORA-2021-67efe88c29", refsource: "FEDORA", tags: [ "Mailing List", "Third Party Advisory", ], url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/", }, ], }, }, impact: { baseMetricV2: { acInsufInfo: false, cvssV2: { accessComplexity: "LOW", accessVector: "LOCAL", authentication: "NONE", availabilityImpact: "PARTIAL", baseScore: 2.1, confidentialityImpact: "NONE", integrityImpact: "NONE", vectorString: "AV:L/AC:L/Au:N/C:N/I:N/A:P", version: "2.0", }, exploitabilityScore: 3.9, impactScore: 2.9, obtainAllPrivilege: false, obtainOtherPrivilege: false, obtainUserPrivilege: false, severity: "LOW", userInteractionRequired: false, }, baseMetricV3: { cvssV3: { attackComplexity: "LOW", attackVector: "LOCAL", availabilityImpact: "LOW", baseScore: 3.3, baseSeverity: "LOW", confidentialityImpact: "NONE", integrityImpact: "NONE", privilegesRequired: "LOW", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", version: "3.1", }, exploitabilityScore: 1.8, impactScore: 1.4, }, }, lastModifiedDate: "2021-11-17T14:05Z", publishedDate: "2021-07-01T03:15Z", }, }, }
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Sightings
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Nomenclature
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