# CVE-2021-21300: Git for Visual Studio Remote Code Execution Vulnerability CVE-2021-21300 is fixed in 13 products on 1 platform, first by git 1:2.17.1-1ubuntu0.8, released March 9, 2021. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2021-21300 - Priority: Urgent - CVSS: 8.8 (Critical) - EPSS: 0.8853 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Mar 9, 2021 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/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'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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | git Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-all Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-all 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-all-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-all Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-all 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-all-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-cvs Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-cvs 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-cvs-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-cvs Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-cvs 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-cvs-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-daemon-run Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-daemon-run 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-daemon-run-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-daemon-run Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-daemon-run 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-daemon-run-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-daemon-sysvinit Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-daemon-sysvinit 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-daemon-sysvinit-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-daemon-sysvinit Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-daemon-sysvinit 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-daemon-sysvinit-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-el Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-el 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-el-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-el Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-el 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-el-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-email Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-email 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-email-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-email Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-email 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-email-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-gui Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-gui 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-gui-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-gui Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-gui 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-gui-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-man Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-man 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-man-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-man Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-man 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-man-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-mediawiki Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-mediawiki 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-mediawiki-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-mediawiki Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-mediawiki 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-mediawiki-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | git-svn Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [git-svn 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-git-svn-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | git-svn Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [git-svn 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-git-svn-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | gitk Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [gitk 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gitk-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | gitk Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [gitk 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gitk-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | | Linux | gitweb Ubuntu 18.04.6 LTS (bionic) | 1:2.17.1-1ubuntu0.8 | [gitweb 1:2.17.1-1ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gitweb-1-2.17.1-1ubuntu0.8.md) | Mar 9, 2021 | | Linux | gitweb Ubuntu 20.04 LTS (focal) | 1:2.25.1-1ubuntu3.1 | [gitweb 1:2.25.1-1ubuntu3.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gitweb-1-2.25.1-1ubuntu3.1.md) | Mar 9, 2021 | --- Data as of 2026-11-09T07:25:28Z UTC. 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