CVE-2021-21237
published 2021-01-15CVE-2021-21237: 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…
PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.44%
34.9th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | git-lfs | — | — |
| git_large_file_storage_project | git_large_file_storage | < 2.13.2 | 2.13.2 |
| github.com | git-lfs_git-lfs | >= 0 < 2.13.2 | 2.13.2 |
| github.com | git-lfs_git-lfs | >= 0 < 1.5.1-0.20210113180018-fc664697ed2c | 1.5.1-0.20210113180018-fc664697ed2c |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
ghsa9.8CRITICAL
osv9.8CRITICAL
vendor_debian9.8LOW
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OSV
Git LFS can execute a Git binary from the current directory on Windows
osv·2022-02-15·CVSS 9.8
CVE-2021-21237 [CRITICAL] Git LFS can execute a Git binary from the current directory on Windows
Git LFS can execute a Git binary from the current directory on Windows
### Impact
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](https://github.com/golang/go/issues/38736).
### Patches
This version should be patched in v2.13.2, which will be released in coordination with this security advisory.
### Workarounds
Other than avoiding untrusted repositories or using a different operating syste
GHSA
Git LFS can execute a Git binary from the current directory on Windows
ghsa·2022-02-15·CVSS 9.8
CVE-2021-21237 [CRITICAL] CWE-426 Git LFS can execute a Git binary from the current directory on Windows
Git LFS can execute a Git binary from the current directory on Windows
### Impact
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](https://github.com/golang/go/issues/38736).
### Patches
This version should be patched in v2.13.2, which will be released in coordination with this security advisory.
### Workarounds
Other than avoiding untrusted repositories or using a different operating syste
OSV
Arbitrary code execution on Windows in github.com/git-lfs/git-lfs
osv·2021-04-14
CVE-2021-21237 Arbitrary code execution on Windows in github.com/git-lfs/git-lfs
Arbitrary code execution on Windows in github.com/git-lfs/git-lfs
Due to the standard library behavior of exec.LookPath on Windows a number of methods may result in arbitrary code execution when cloning or operating on untrusted Git repositories.
OSV
CVE-2021-21237: Git LFS is a command line extension for managing large files with Git
osv·2021-01-15·CVSS 9.8
CVE-2021-21237 [CRITICAL] CVE-2021-21237: Git LFS is a command line extension for managing large files with Git
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.
Debian
CVE-2021-21237: git-lfs - Git LFS is a command line extension for managing large files with Git. On Window...
vendor_debian·2021·CVSS 9.8
CVE-2021-21237 [CRITICAL] CVE-2021-21237: git-lfs - Git LFS is a command line extension for managing large files with Git. On Window...
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.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved
sid: resolved
trixie: resolved
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72ahttps://github.com/git-lfs/git-lfs/releases/tag/v2.13.2https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955https://github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72ahttps://github.com/git-lfs/git-lfs/releases/tag/v2.13.2https://github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5
2021-01-15
Published