CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
99.4%
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.
This version should be patched in v2.13.2, which will be released in coordination with this security advisory.
Other than avoiding untrusted repositories or using a different operating system, there is no workaround.
Are there any links users can visit to find out more?
If you have any questions or comments about this advisory:
github.com
.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27955
github.com/advisories/GHSA-cx3w-xqmc-84g5
github.com/git-lfs/git-lfs/commit/fc664697ed2c2081ee9633010de0a7f9debea72a
github.com/git-lfs/git-lfs/releases/tag/v2.13.2
github.com/git-lfs/git-lfs/security/advisories/GHSA-cx3w-xqmc-84g5
nvd.nist.gov/vuln/detail/CVE-2021-21237
pkg.go.dev/vuln/GO-2021-0098
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
99.4%