CVE-2021-21300
- Source
- https://cve.org/CVERecord?id=CVE-2021-21300
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21300.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-21300
- Downstream
- Related
- Published
- 2021-03-09T20:15:13.260Z
- Modified
- 2026-04-16T04:35:00.022931657Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- 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. - References
-
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LMXX2POK5X576BSDWSXGU7EIK6I72ERU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBPNGLQSYJHLZZ37BO42YY6S5OTIF4L4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCLJJLKKMS5WRFO6C475AOUZTWQLIARX/
- https://lore.kernel.org/git/xmqqim6019yd.fsf%40gitster.c.googlers.com/
- http://seclists.org/fulldisclosure/2021/Apr/60
- https://git-scm.com/docs/git-config#Documentation/git-config.txt-coresymlinks
- https://github.com/git/git/security/advisories/GHSA-8prw-h3cq-mghm
- https://lists.debian.org/debian-lts-announce/2022/10/msg00014.html
- https://security.gentoo.org/glsa/202104-01
- https://git-scm.com/docs/gitattributes#_filter
- https://support.apple.com/kb/HT212320
- https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592
- http://packetstormsecurity.com/files/163978/Git-LFS-Clone-Command-Execution.html
- http://www.openwall.com/lists/oss-security/2021/03/09/3
Affected packages
Git / github.com/git/git
Affected ranges
- Type
- GIT
- Repo
- https://github.com/git/git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affectedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedLast affectedIntroduced0 Unknown introduced commit / All previous commits are affectedLast affectedFixed
- Database specific
{ "versions": [ { "introduced": "0" }, { "last_affected": "2.14.2" }, { "introduced": "2.17.0" }, { "fixed": "2.17.6" }, { "introduced": "2.18.0" }, { "fixed": "2.18.5" }, { "introduced": "2.19.0" }, { "fixed": "2.19.6" }, { "introduced": "2.20.0" }, { "fixed": "2.20.5" }, { "introduced": "2.21.0" }, { "fixed": "2.21.4" }, { "introduced": "2.22.0" }, { "fixed": "2.22.5" }, { "introduced": "2.23.0" }, { "fixed": "2.23.4" }, { "introduced": "2.24.0" }, { "fixed": "2.24.4" }, { "introduced": "2.25.0" }, { "fixed": "2.25.5" }, { "introduced": "2.26.0" }, { "fixed": "2.26.3" }, { "introduced": "2.29.0" }, { "fixed": "2.29.3" }, { "introduced": "2.30.0" }, { "fixed": "2.30.2" }, { "introduced": "0" }, { "last_affected": "2.27.0" }, { "introduced": "0" }, { "last_affected": "2.28.0" } ] }
Affected versions
v0.*
v0.99
v0.99.1
v0.99.2
v0.99.3
v0.99.4
v0.99.5
v0.99.6
v0.99.7
v0.99.8
v0.99.8a
v0.99.8b
v0.99.8c
v0.99.8d
v0.99.8e
v0.99.8f
v0.99.8g
v0.99.9a
v0.99.9b
v0.99.9c
v0.99.9d
v0.99.9e
v0.99.9f
v0.99.9g
v0.99.9h
v0.99.9i
v0.99.9j
v0.99.9k
v0.99.9l
v0.99.9m
v0.99.9n
v1.*
v1.0.0
v1.0rc1
v1.0rc2
v1.0rc3
v1.0rc4
v1.0rc5
v1.0rc6
v1.1.0
v1.2.0
v1.3.0-rc1
v1.4.1
v1.4.1-rc1
v1.4.1-rc2
v1.4.2
v1.4.2-rc1
v1.4.2-rc2
v1.4.2-rc3
v1.4.2-rc4
v1.4.3
v1.4.3-rc1
v1.4.3-rc2
v1.4.3-rc3
v1.4.4
v1.4.4-rc1
v1.4.4-rc2
v1.4.4.1
v1.5.0
v1.5.0-rc0
v1.5.0-rc1
v1.5.0-rc2
v1.5.0-rc3
v1.5.0-rc4
v1.5.1
v1.5.1-rc1
v1.5.1-rc2
v1.5.1-rc3
v1.5.2
v1.5.2-rc0
v1.5.2-rc1
v1.5.2-rc2
v1.5.2-rc3
v1.5.3
v1.5.3-rc0
v1.5.3-rc1
v1.5.3-rc2
v1.5.3-rc3
v1.5.3-rc4
v1.5.3-rc5
v1.5.3-rc6
v1.5.3-rc7
v1.5.3.1
v1.5.4
v1.5.4-rc0
v1.5.4-rc1
v1.5.4-rc2
v1.5.4-rc3
v1.5.4-rc4
v1.5.4-rc5
v1.5.5
v1.5.5-rc0
v1.5.5-rc1
v1.5.5-rc2
v1.5.5-rc3
v1.5.6
v1.5.6-rc0
v1.5.6-rc1
v1.5.6-rc2
v1.5.6-rc3
v1.6.0
v1.6.0-rc0
v1.6.0-rc1
v1.6.0-rc2
v1.6.0-rc3
v1.6.1
v1.6.1-rc1
v1.6.1-rc2
v1.6.1-rc3
v1.6.1-rc4
v1.6.2
v1.6.2-rc0
v1.6.2-rc1
v1.6.2-rc2
v1.6.3
v1.6.3-rc0
v1.6.3-rc1
v1.6.3-rc2
v1.6.3-rc3
v1.6.3-rc4
v1.6.4
v1.6.4-rc0
v1.6.4-rc1
v1.6.4-rc2
v1.6.4-rc3
v1.6.5
v1.6.5-rc0
v1.6.5-rc1
v1.6.5-rc2
v1.6.5-rc3
v1.6.6
v1.6.6-rc0
v1.6.6-rc1
v1.6.6-rc2
v1.6.6-rc3
v1.6.6-rc4
v1.7.0
v1.7.0-rc0
v1.7.0-rc1
v1.7.0-rc2
v1.7.1
v1.7.1-rc0
v1.7.1-rc1
v1.7.1-rc2
v1.7.10
v1.7.10-rc0
v1.7.10-rc1
v1.7.10-rc2
v1.7.10-rc3
v1.7.10-rc4
v1.7.11
v1.7.11-rc0
v1.7.11-rc1
v1.7.11-rc2
v1.7.11-rc3
v1.7.12
v1.7.12-rc0
v1.7.12-rc1
v1.7.12-rc2
v1.7.12-rc3
v1.7.2
v1.7.2-rc0
v1.7.2-rc1
v1.7.2-rc2
v1.7.2-rc3
v1.7.3
v1.7.3-rc0
v1.7.3-rc1
v1.7.3-rc2
v1.7.3.1
v1.7.4
v1.7.4-rc0
v1.7.4-rc1
v1.7.4-rc2
v1.7.4-rc3
v1.7.5
v1.7.5-rc0
v1.7.5-rc1
v1.7.5-rc2
v1.7.5-rc3
v1.7.6
v1.7.6-rc0
v1.7.6-rc1
v1.7.6-rc2
v1.7.6-rc3
v1.7.7
v1.7.7-rc0
v1.7.7-rc1
v1.7.7-rc2
v1.7.7-rc3
v1.7.8
v1.7.8-rc0
v1.7.8-rc1
v1.7.8-rc2
v1.7.8-rc3
v1.7.8-rc4
v1.7.9
v1.7.9-rc0
v1.7.9-rc1
v1.7.9-rc2
v1.8.0
v1.8.0-rc0
v1.8.0-rc1
v1.8.0-rc2
v1.8.0-rc3
v1.8.1
v1.8.1-rc0
v1.8.1-rc1
v1.8.1-rc2
v1.8.1-rc3
v1.8.2
v1.8.2-rc0
v1.8.2-rc1
v1.8.2-rc2
v1.8.2-rc3
v1.8.3
v1.8.3-rc0
v1.8.3-rc1
v1.8.3-rc2
v1.8.3-rc3
v1.8.4
v1.8.4-rc0
v1.8.4-rc1
v1.8.4-rc2
v1.8.4-rc3
v1.8.4-rc4
v1.8.5
v1.8.5-rc0
v1.8.5-rc1
v1.8.5-rc2
v1.8.5-rc3
v1.9-rc0
v1.9-rc1
v1.9-rc2
v1.9.0
v1.9.0-rc3
v2.*
v2.0.0
v2.0.0-rc0
v2.0.0-rc1
v2.0.0-rc2
v2.0.0-rc3
v2.0.0-rc4
v2.1.0
v2.1.0-rc0
v2.1.0-rc1
v2.1.0-rc2
v2.10.0
v2.10.0-rc0
v2.10.0-rc1
v2.10.0-rc2
v2.11.0
v2.11.0-rc0
v2.11.0-rc1
v2.11.0-rc2
v2.11.0-rc3
v2.12.0
v2.12.0-rc0
v2.12.0-rc1
v2.12.0-rc2
v2.13.0
v2.13.0-rc0
v2.13.0-rc1
v2.13.0-rc2
v2.14.0
v2.14.0-rc0
v2.14.0-rc1
v2.14.1
v2.14.2
v2.17.0
v2.17.1
v2.17.2
v2.17.3
v2.17.4
v2.17.5
v2.18.0
v2.18.1
v2.18.2
v2.18.3
v2.18.4
v2.19.0
v2.19.1
v2.19.2
v2.19.3
v2.19.4
v2.19.5
v2.2.0
v2.2.0-rc0
v2.2.0-rc1
v2.2.0-rc2
v2.2.0-rc3
v2.20.0
v2.20.1
v2.20.2
v2.20.3
v2.20.4
v2.21.0
v2.21.1
v2.21.2
v2.21.3
v2.22.0
v2.22.1
v2.22.2
v2.22.3
v2.22.4
v2.23.0
v2.23.1
v2.23.2
v2.23.3
v2.24.0
v2.24.1
v2.24.2
v2.24.3
v2.25.0
v2.25.1
v2.25.2
v2.25.3
v2.25.4
v2.26.0
v2.26.1
v2.26.2
v2.27.0
v2.27.0-rc0
v2.27.0-rc1
v2.27.0-rc2
v2.28.0
v2.28.0-rc0
v2.28.0-rc1
v2.28.0-rc2
v2.29.0
v2.29.1
v2.29.2
v2.3.0
v2.3.0-rc0
v2.3.0-rc1
v2.3.0-rc2
v2.30.0
v2.30.1
v2.4.0
v2.4.0-rc0
v2.4.0-rc1
v2.4.0-rc2
v2.4.0-rc3
v2.5.0
v2.5.0-rc0
v2.5.0-rc1
v2.5.0-rc2
v2.5.0-rc3
v2.6.0
v2.6.0-rc0
v2.6.0-rc1
v2.6.0-rc2
v2.6.0-rc3
v2.7.0
v2.7.0-rc0
v2.7.0-rc1
v2.7.0-rc2
v2.7.0-rc3
v2.8.0
v2.8.0-rc0
v2.8.0-rc1
v2.8.0-rc2
v2.8.0-rc3
v2.8.0-rc4
v2.9.0
v2.9.0-rc0
v2.9.0-rc1
v2.9.0-rc2
Database specific
vanir_signatures_modified
"2026-04-11T23:33:55Z"
vanir_signatures
[
{
"id": "CVE-2021-21300-15a4833d",
"signature_version": "v1",
"digest": {
"line_hashes": [
"276677503004035957720297652347060290279",
"194300041489366364803722943678753375976",
"326368134096761905215852270671667464242",
"255339043160293375611455199595722318847"
],
"threshold": 0.9
},
"source": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592",
"deprecated": false,
"target": {
"file": "cache.h"
},
"signature_type": "Line"
},
{
"id": "CVE-2021-21300-39a1bc57",
"signature_version": "v1",
"digest": {
"function_hash": "249291322838791192183549209301243117633",
"length": 606.0
},
"source": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592",
"deprecated": false,
"target": {
"function": "mingw_rmdir",
"file": "compat/mingw.c"
},
"signature_type": "Function"
},
{
"id": "CVE-2021-21300-54a4a911",
"signature_version": "v1",
"digest": {
"line_hashes": [
"52405788541650449857671201861593003433",
"118767286671706823813543168271443044398",
"294277434565854147747340188632148379712",
"6269988942282923549050380572644560961"
],
"threshold": 0.9
},
"source": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592",
"signature_type": "Line",
"target": {
"file": "compat/mingw.c"
},
"deprecated": false
},
{
"id": "CVE-2021-21300-ee846581",
"signature_version": "v1",
"signature_type": "Line",
"source": "https://github.com/git/git/commit/684dd4c2b414bcf648505e74498a608f28de4592",
"deprecated": false,
"target": {
"file": "git-compat-util.h"
},
"digest": {
"line_hashes": [
"98106067658817072442339340836510065327",
"266101509246156468219369285670669909114",
"67565927279547095135265739457466178456"
],
"threshold": 0.9
}
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21300.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "32"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "33"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "34"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "12.5"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "10.0"
}
]
}
]