gsd-2021-21300
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won't work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6.
Aliases
Aliases
{ "GSD": { "alias": "CVE-2021-21300", "description": "Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won\u0027t work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6.", "id": "GSD-2021-21300", "references": [ "https://www.suse.com/security/cve/CVE-2021-21300.html", "https://ubuntu.com/security/CVE-2021-21300", "https://advisories.mageia.org/CVE-2021-21300.html", "https://security.archlinux.org/CVE-2021-21300", "https://alas.aws.amazon.com/cve/html/CVE-2021-21300.html", "https://packetstormsecurity.com/files/cve/CVE-2021-21300" ] }, "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2021-21300" ], "details": "Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won\u0027t work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6.", "id": "GSD-2021-21300", "modified": "2023-12-13T01:23:10.982132Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-21300", "STATE": "PUBLIC", "TITLE": "malicious repositories can execute remote code while cloning" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "git", "version": { "version_data": [ { "version_value": "\u003e= 2.14.2, \u003c 2.17.62.17.6" }, { "version_value": "\u003e= 2.18.0, \u003c 2.18.5" }, { "version_value": "\u003e= 2.19.0, \u003c 2.19.6" }, { "version_value": "\u003e= 2.20.0, \u003c 2.20.5" }, { "version_value": "\u003e= 2.21.0, \u003c 2.21.4" }, { "version_value": "\u003e= 2.22.0, \u003c 2.22.5" }, { "version_value": "\u003e= 2.23.0, \u003c 2.23.4" }, { "version_value": "\u003e= 2.24.0, \u003c 2.24.4" }, { "version_value": "\u003e= 2.25.0, \u003c 2.25.5" }, { "version_value": "\u003e= 2.26.0, \u003c 2.26.3" }, { "version_value": "\u003e= 2.27.0, \u003c 2.27.1" }, { "version_value": "\u003e= 2.28.0, \u003c 2.28.1" }, { "version_value": "\u003e= 2.29.0, \u003c 2.29.3" }, { "version_value": "\u003e= 2.30.0, \u003c 2.30.1" } ] } } ] }, "vendor_name": "git" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won\u0027t work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6." } ] }, "impact": { "cvss": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N", "version": "3.1" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)" } ] } ] }, "references": { "reference_data": [ { "name": "https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm", "refsource": "CONFIRM", "url": "https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm" }, { "name": "https://lore.kernel.org/git/xmqqim6019yd.fsf@gitster.c.googlers.com/", "refsource": "MISC", "url": "https://lore.kernel.org/git/xmqqim6019yd.fsf@gitster.c.googlers.com/" }, { "name": "https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks", "refsource": "MISC", "url": "https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks" }, { "name": "https://git-scm.com/docs/gitattributes#_filter", "refsource": "MISC", "url": "https://git-scm.com/docs/gitattributes#_filter" }, { "name": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592", "refsource": "MISC", "url": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592" }, { "name": "[oss-security] 20210309 git: malicious repositories can execute remote code while cloning", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2021/03/09/3" }, { "name": "FEDORA-2021-63fcbd126e", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/" }, { "name": "FEDORA-2021-ffd0b2108d", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/" }, { "name": "FEDORA-2021-03e61a6647", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/" }, { "name": "https://support.apple.com/kb/HT212320", "refsource": "CONFIRM", "url": "https://support.apple.com/kb/HT212320" }, { "name": "20210427 APPLE-SA-2021-04-26-10 Xcode 12.5", "refsource": "FULLDISC", "url": "http://seclists.org/fulldisclosure/2021/Apr/60" }, { "name": "GLSA-202104-01", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/202104-01" }, { "name": "http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html", "refsource": "MISC", "url": "http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html" }, { "name": "[debian-lts-announce] 20221010 [SECURITY] [DLA 3145-1] git security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00014.html" } ] }, "source": { "advisory": "GHSA-8prw-h3cq-mghm", "discovery": "UNKNOWN" } }, "nvd.nist.gov": { "configurations": { "CVE_data_version": "4.0", "nodes": [ { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndIncluding": "2.14.2", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.25.5", "versionStartIncluding": "2.25.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.24.4", "versionStartIncluding": "2.24.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.23.4", "versionStartIncluding": "2.23.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.22.5", "versionStartIncluding": "2.22.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.21.4", "versionStartIncluding": "2.21.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.20.5", "versionStartIncluding": "2.20.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.19.6", "versionStartIncluding": "2.19.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.18.5", "versionStartIncluding": "2.18.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.17.6", "versionStartIncluding": "2.17.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.26.3", "versionStartIncluding": "2.26.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.29.3", "versionStartIncluding": "2.29.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "2.30.2", "versionStartIncluding": "2.30.0", "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:2.27.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:a:git-scm:git:2.28.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true } ], "operator": "OR" }, { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true }, { "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true } ], "operator": "OR" }, { "children": [ { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:a:apple:xcode:*:*:*:*:*:*:*:*", "cpe_name": [], "versionEndExcluding": "12.5", "vulnerable": true } ], "operator": "OR" }, { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "cpe_name": [], "versionStartIncluding": "11.0", "vulnerable": false } ], "operator": "OR" } ], "cpe_match": [], "operator": "AND" }, { "children": [], "cpe_match": [ { "cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true } ], "operator": "OR" } ] }, "cve": { "CVE_data_meta": { "ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-21300" }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "en", "value": "Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won\u0027t work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "en", "value": "CWE-59" } ] } ] }, "references": { "reference_data": [ { "name": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592", "refsource": "MISC", "tags": [ "Patch", "Third Party Advisory" ], "url": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592" }, { "name": "https://git-scm.com/docs/gitattributes#_filter", "refsource": "MISC", "tags": [ "Vendor Advisory" ], "url": "https://git-scm.com/docs/gitattributes#_filter" }, { "name": "https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm", "refsource": "CONFIRM", "tags": [ "Third Party Advisory" ], "url": "https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm" }, { "name": "https://lore.kernel.org/git/xmqqim6019yd.fsf@gitster.c.googlers.com/", "refsource": "MISC", "tags": [ "Release Notes", "Third Party Advisory" ], "url": "https://lore.kernel.org/git/xmqqim6019yd.fsf@gitster.c.googlers.com/" }, { "name": "https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks", "refsource": "MISC", "tags": [ "Vendor Advisory" ], "url": "https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks" }, { "name": "[oss-security] 20210309 git: malicious repositories can execute remote code while cloning", "refsource": "MLIST", "tags": [ "Exploit", "Mailing List", "Third Party Advisory" ], "url": "http://www.openwall.com/lists/oss-security/2021/03/09/3" }, { "name": "FEDORA-2021-63fcbd126e", "refsource": "FEDORA", "tags": [ "Third Party Advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/" }, { "name": "FEDORA-2021-ffd0b2108d", "refsource": "FEDORA", "tags": [ "Mailing List", "Third Party Advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/" }, { "name": "FEDORA-2021-03e61a6647", "refsource": "FEDORA", "tags": [ "Mailing List", "Third Party Advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/" }, { "name": "https://support.apple.com/kb/HT212320", "refsource": "CONFIRM", "tags": [ "Third Party Advisory" ], "url": "https://support.apple.com/kb/HT212320" }, { "name": "20210427 APPLE-SA-2021-04-26-10 Xcode 12.5", "refsource": "FULLDISC", "tags": [ "Mailing List", "Third Party Advisory" ], "url": "http://seclists.org/fulldisclosure/2021/Apr/60" }, { "name": "GLSA-202104-01", "refsource": "GENTOO", "tags": [ "Third Party Advisory" ], "url": "https://security.gentoo.org/glsa/202104-01" }, { "name": "http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html", "refsource": "MISC", "tags": [ "Exploit", "Third Party Advisory", "VDB Entry" ], "url": "http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html" }, { "name": "[debian-lts-announce] 20221010 [SECURITY] [DLA 3145-1] git security update", "refsource": "MLIST", "tags": [ "Mailing List", "Third Party Advisory" ], "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00014.html" } ] } }, "impact": { "baseMetricV2": { "acInsufInfo": false, "cvssV2": { "accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "version": "2.0" }, "exploitabilityScore": 4.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "severity": "MEDIUM", "userInteractionRequired": true }, "baseMetricV3": { "cvssV3": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1" }, "exploitabilityScore": 1.6, "impactScore": 5.9 } }, "lastModifiedDate": "2022-12-06T21:38Z", "publishedDate": "2021-03-09T20:15Z" } } }
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Sightings
Author | Source | Type | Date |
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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.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- 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.