GSD-2021-21237
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-21237",
"description": "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.",
"id": "GSD-2021-21237",
"references": [
"https://security.archlinux.org/CVE-2021-21237"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-21237"
],
"details": "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.",
"id": "GSD-2021-21237",
"modified": "2023-12-13T01:23:11.194639Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
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"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": "\u003c 2.13.2"
}
]
}
}
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}
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"description": {
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"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"
},
{
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"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"
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{
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]
},
"source": {
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"discovery": "UNKNOWN"
}
},
"gitlab.com": {
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"cvss_v3": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"cwe_ids": [
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"date": "2022-02-15",
"description": "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.",
"fixed_versions": [
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],
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"GHSA-cx3w-xqmc-84g5",
"CVE-2021-21237"
],
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"package_slug": "go/github.com/git-lfs/git-lfs",
"pubdate": "2022-02-15",
"solution": "Upgrade to version 2.13.2 or above.",
"title": "Untrusted Search Path",
"urls": [
"https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5",
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"https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a",
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"https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2",
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"uuid": "923a4c28-c2f6-4409-bd5b-a70aeff0da68",
"versions": [
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"timestamp": "20210113180018"
},
"number": "v2.13.2"
}
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},
{
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"affected_versions": "All versions before 2.13.2",
"cvss_v2": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
"cvss_v3": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"cwe_ids": [
"CWE-1035",
"CWE-426",
"CWE-78",
"CWE-937"
],
"date": "2023-02-09",
"description": "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.",
"fixed_versions": [
"v2.13.2"
],
"identifier": "CVE-2021-21237",
"identifiers": [
"GHSA-cx3w-xqmc-84g5",
"CVE-2021-21237"
],
"not_impacted": "All versions starting from 2.13.2",
"package_slug": "go/github.com/git-lfs/git-lfs/commands",
"pubdate": "2022-02-15",
"solution": "Upgrade to version 2.13.2 or above.",
"title": "Untrusted Search Path",
"urls": [
"https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5",
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"https://github.com/git-lfs/git-lfs/releases/tag/v2.13.2",
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"CWE-937"
],
"date": "2023-02-09",
"description": "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.",
"fixed_versions": [
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"package_slug": "go/github.com/git-lfs/git-lfs/creds",
"pubdate": "2022-02-15",
"solution": "Upgrade to version 2.13.2 or above.",
"title": "Untrusted Search Path",
"urls": [
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"description": "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.",
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"impact": {
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"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.6,
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"integrityImpact": "PARTIAL",
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"exploitabilityScore": 3.9,
"impactScore": 6.4,
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"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
},
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
},
"lastModifiedDate": "2021-01-29T22:18Z",
"publishedDate": "2021-01-15T18:15Z"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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