CVE-2021-21237
Vulnerability from cvelistv5
Published
2021-01-15 17:36
Modified
2024-08-03 18:09
Severity ?
EPSS score ?
Summary
Git LFS is a command line extension for managing large files with Git. On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems. This is the result of an incomplete fix for CVE-2020-27955. This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator. Other than avoiding untrusted repositories or using a different operating system, there is no workaround. This is fixed in v2.13.2.
References
{ containers: { adp: [ { providerMetadata: { dateUpdated: "2024-08-03T18:09:15.015Z", orgId: "af854a3a-2127-422b-91ae-364da2661108", shortName: "CVE", }, references: [ { tags: [ "x_refsource_CONFIRM", "x_transferred", ], url: "https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5", }, { tags: [ "x_refsource_MISC", "x_transferred", ], url: "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955", }, { tags: [ "x_refsource_MISC", "x_transferred", ], url: "https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2", }, { tags: [ "x_refsource_MISC", "x_transferred", ], url: "https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a", }, ], title: "CVE Program Container", }, ], cna: { affected: [ { product: "git-lfs", vendor: "git-lfs", versions: [ { status: "affected", version: "< 2.13.2", }, ], }, ], descriptions: [ { lang: "en", value: "Git LFS is a command line extension for managing large files with Git. On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems. This is the result of an incomplete fix for CVE-2020-27955. This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator. Other than avoiding untrusted repositories or using a different operating system, there is no workaround. This is fixed in v2.13.2.", }, ], metrics: [ { cvssV3_1: { attackComplexity: "HIGH", attackVector: "LOCAL", availabilityImpact: "NONE", baseScore: 7.2, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "LOW", scope: "CHANGED", userInteraction: "REQUIRED", vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N", version: "3.1", }, }, ], problemTypes: [ { descriptions: [ { cweId: "CWE-426", description: "CWE-426 Untrusted Search Path", lang: "en", type: "CWE", }, ], }, ], providerMetadata: { dateUpdated: "2021-01-15T17:36:09", orgId: "a0819718-46f1-4df5-94e2-005712e83aaa", shortName: "GitHub_M", }, references: [ { tags: [ "x_refsource_CONFIRM", ], url: "https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5", }, { tags: [ "x_refsource_MISC", ], url: "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955", }, { tags: [ "x_refsource_MISC", ], url: "https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2", }, { tags: [ "x_refsource_MISC", ], url: "https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a", }, ], source: { advisory: "GHSA-cx3w-xqmc-84g5", discovery: "UNKNOWN", }, title: "Git LFS can execute a Git binary from the current directory on Windows", x_legacyV4Record: { CVE_data_meta: { ASSIGNER: "security-advisories@github.com", ID: "CVE-2021-21237", STATE: "PUBLIC", TITLE: "Git LFS can execute a Git binary from the current directory on Windows", }, affects: { vendor: { vendor_data: [ { product: { product_data: [ { product_name: "git-lfs", version: { version_data: [ { version_value: "< 2.13.2", }, ], }, }, ], }, vendor_name: "git-lfs", }, ], }, }, data_format: "MITRE", data_type: "CVE", data_version: "4.0", description: { description_data: [ { lang: "eng", value: "Git LFS is a command line extension for managing large files with Git. On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems. This is the result of an incomplete fix for CVE-2020-27955. This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator. Other than avoiding untrusted repositories or using a different operating system, there is no workaround. This is fixed in v2.13.2.", }, ], }, impact: { cvss: { attackComplexity: "HIGH", attackVector: "LOCAL", availabilityImpact: "NONE", baseScore: 7.2, baseSeverity: "HIGH", confidentialityImpact: "HIGH", integrityImpact: "HIGH", privilegesRequired: "LOW", scope: "CHANGED", userInteraction: "REQUIRED", vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N", version: "3.1", }, }, problemtype: { problemtype_data: [ { description: [ { lang: "eng", value: "CWE-426 Untrusted Search Path", }, ], }, ], }, references: { reference_data: [ { name: "https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5", refsource: "CONFIRM", url: "https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5", }, { name: "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955", refsource: "MISC", url: "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955", }, { name: "https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2", refsource: "MISC", url: "https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2", }, { name: "https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a", refsource: "MISC", url: "https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a", }, ], }, source: { advisory: "GHSA-cx3w-xqmc-84g5", discovery: "UNKNOWN", }, }, }, }, cveMetadata: { assignerOrgId: "a0819718-46f1-4df5-94e2-005712e83aaa", assignerShortName: "GitHub_M", cveId: "CVE-2021-21237", datePublished: "2021-01-15T17:36:09", dateReserved: "2020-12-22T00:00:00", dateUpdated: "2024-08-03T18:09:15.015Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", "vulnerability-lookup:meta": { nvd: "{\"cve\":{\"id\":\"CVE-2021-21237\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2021-01-15T18:15:15.980\",\"lastModified\":\"2024-11-21T05:47:50.287\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Git LFS is a command line extension for managing large files with Git. On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems. This is the result of an incomplete fix for CVE-2020-27955. This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator. Other than avoiding untrusted repositories or using a different operating system, there is no workaround. This is fixed in v2.13.2.\"},{\"lang\":\"es\",\"value\":\"Git LFS es una extensión de línea de comandos para administrar archivos grandes con Git. En Windows, si Git LFS opera en un repositorio malicioso con un archivo git.bat o git.exe en el directorio actual, ese programa será ejecutado, permitiendo al atacante ejecutar código arbitrario. Esto no afecta a los sistemas Unix. Este es el resultado de una corrección incompleta para CVE-2020-27955. Este problema ocurre porque en Windows, Go incluye (y prefiere) el directorio actual cuando el nombre de un comando ejecutado no contiene un separador de directorio. Aparte de evitar los repositorios que no son confiables o usando un sistema operativo diferente, no se presenta una solución alternativa. Esto es corregido en versión v2.13.2\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N\",\"baseScore\":7.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":0.8,\"impactScore\":5.8},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":4.6,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.9,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-426\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"2.13.2\",\"matchCriteriaId\":\"ED5A8512-DFF5-4912-9924-FE6C511D14A5\"}]}]}],\"references\":[{\"url\":\"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}", }, }
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Sightings
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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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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.