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 wont 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.
Risk Information
Base Score
8.7
MODERATE
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
EPSS Score
Exploitation Probability
67.162
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Vulnerability CVE-2021-21300 are affected in Git (x64) 2.30.1 | Windows |
| Vulnerability CVE-2021-21300 are affected in Git 2.30.1 | Windows |
| Vulnerabilities CVE-2017-15298,CVE-2019-19604,CVE-2021-21300 are affected in Git (X64) 2.2.0-- | Windows |
| Vulnerabilities CVE-2017-15298,CVE-2019-19604,CVE-2021-21300 are affected in Git 2.2.0-- | Windows |
| Vulnerabilities CVE-2019-1348,CVE-2019-19604,CVE-2021-21300 are affected in Git (X64) 2.21.0-- | Windows |
| Vulnerabilities CVE-2019-1348,CVE-2019-19604,CVE-2021-21300 are affected in Git 2.21.0-- | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.17.5 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.18.0-- | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.19.0-- | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.20.4 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.22.4 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.23.3 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.24.3 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.25.2 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.26.0-rc2 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.27.0 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.28.0 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.29.2 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git (X64) 2.30.1 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.17.5 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.18.0-- | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.19.0-- | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.20.4 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.22.4 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.23.3 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.24.3 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.25.2 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.26.0-rc2 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.27.0 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.28.0 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.29.2 | Windows |
| Vulnerabilities CVE-2021-21300 are affected in Git 2.30.1 | Windows |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-core-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-core-debuginfo-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-cvs-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-daemon-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-daemon-debuginfo-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-debugsource-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-email-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-gui-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-svn-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) git-web-2.26.2-27.43.1.x86_64.rpm | Linux |
| SUSE-SU-2021:0756-1(SUSE Linux Enterprise Server 12-SP5 ) gitk-2.26.2-27.43.1.x86_64.rpm | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.17.1-1ubuntu0.8_i386.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.17.1-1ubuntu0.8_amd64.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.25.1-1ubuntu3.1_i386.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.25.1-1ubuntu3.1_amd64.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.27.0-1ubuntu1.1_i386.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.27.0-1ubuntu1.1_amd64.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.7.4-0ubuntu1.10_i386.deb | Linux |
| fast, scalable, distributed revision control system (USN-4761-1) git_2.7.4-0ubuntu1.10_amd64.deb | Linux |
| SUSE-SU-2021:0757-1(SUSE Linux Enterprise Module for Development Tools 15-SP3 ) git-svn-debuginfo-2.26.2-3.31.1.x86_64_15_SP3.rpm | Linux |
Patch Details
Click to see the patches provided by ManageEngine for this CVE
| Patch ID | Patch Description |
|---|---|
| PATCH-342450 | Git (x64) (2.47.0.2) |
| PATCH-342449 | Git (2.47.0.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-352878 | Git (x64) (2.51.2) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
| PATCH-350752 | Git (2.50.1) |
References
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234