CVE-2021-21300
Fixed in a distro release EPSS 89%CVSS 8.0
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.
Products: git
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | git | 2.22.5-r0 |
| Alpine 3.11 | git | 2.24.4-r0 |
| Alpine 3.12 | git | 2.26.3-r0 |
| Alpine 3.13 | git | 2.30.2-r0 |
| Alpine 3.14 | git | 2.30.2-r0 |
| Alpine 3.15 | git | 2.30.2-r0 |
| Alpine 3.16 | git | 2.30.2-r0 |
| Alpine 3.17 | git | 2.30.2-r0 |
| Alpine 3.18 | git | 2.30.2-r0 |
| Alpine 3.19 | git | 2.30.2-r0 |
| Alpine 3.20 | git | 2.30.2-r0 |
| Alpine 3.21 | git | 2.30.2-r0 |
| Alpine 3.22 | git | 2.30.2-r0 |
| Alpine 3.23 | git | 2.30.2-r0 |
| Alpine 3.24 | git | 2.30.2-r0 |
| Amazon Linux 2 | git | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-all | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-core | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-core-doc | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-cvs | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-daemon | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-email | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-gui | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-instaweb | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-p4 | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-subtree | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | git-svn | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | gitk | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | gitweb | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | perl-Git | 2.23.4-1.amzn2.0.1 |
| Amazon Linux 2 | perl-Git-SVN | 2.23.4-1.amzn2.0.1 |
| Arch Linux | git | 2.30.2-1 |
| Debian 10 | git | 1:2.20.1-2+deb10u4 |
| Debian 12 | git | 1:2.30.2-1 |
| Debian 13 | git | 1:2.30.2-1 |
| Debian 14 | git | 1:2.30.2-1 |
| SUSE Enterprise Storage 6 | git | 2.26.2-3.31.1 |
| SUSE HPE Helion OpenStack 8 | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | git | 2.31.1-10.3.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | git | 2.31.1-10.3.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server 12 SP2-LTSS | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server 12 SP5 | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server 15 SP1-BCL | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Server 15 SP1-LTSS | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Server 15-LTSS | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | git | 2.26.2-27.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | git | 2.26.2-3.31.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | git | 2.26.2-27.43.1 |
| SUSE Manager Proxy 4.0 | git | 2.26.2-3.31.1 |
| SUSE Manager Retail Branch Server 4.0 | git | 2.26.2-3.31.1 |
| SUSE Manager Server 4.0 | git | 2.26.2-3.31.1 |
| SUSE OpenStack Cloud 7 | git | 2.26.2-27.43.1 |
| SUSE OpenStack Cloud 8 | git | 2.26.2-27.43.1 |
| SUSE OpenStack Cloud 9 | git | 2.26.2-27.43.1 |
| SUSE OpenStack Cloud Crowbar 8 | git | 2.26.2-27.43.1 |
| SUSE OpenStack Cloud Crowbar 9 | git | 2.26.2-27.43.1 |
| Ubuntu 16.04 LTS | git | 1:2.7.4-0ubuntu1.10 |
| Ubuntu 18.04 LTS | git | 1:2.17.1-1ubuntu0.8 |
| Ubuntu 20.04 LTS | git | 1:2.25.1-1ubuntu3.1 |
| openSUSE Leap 15.2 | git | 2.26.2-lp152.2.6.1 |
| openSUSE Leap 15.3 | git | 2.31.1-10.3.1 |
| openSUSE Tumbleweed | git | 2.33.0-1.3 |
| openSUSE Tumbleweed | git-annex | 8.20210903-1.2 |