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.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.0, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), for affected systems. Impacting 5 products from git-scm, from fedoraproject, from apple and 2 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2021-03-09T20:15:13.260
2024-11-21T05:47:58.407
Modified
CVSSv3.1: 8.0 (HIGH)
AV:N/AC:H/Au:N/C:P/I:P/A:P
4.9
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | git-scm | git | ≤ 2.14.2 | Yes |
| Application | git-scm | git | < 2.17.6 | Yes |
| Application | git-scm | git | < 2.18.5 | Yes |
| Application | git-scm | git | < 2.19.6 | Yes |
| Application | git-scm | git | < 2.20.5 | Yes |
| Application | git-scm | git | < 2.21.4 | Yes |
| Application | git-scm | git | < 2.22.5 | Yes |
| Application | git-scm | git | < 2.23.4 | Yes |
| Application | git-scm | git | < 2.24.4 | Yes |
| Application | git-scm | git | < 2.25.5 | Yes |
| Application | git-scm | git | < 2.26.3 | Yes |
| Application | git-scm | git | < 2.29.3 | Yes |
| Application | git-scm | git | < 2.30.2 | Yes |
| Application | git-scm | git | 2.27.0 | Yes |
| Application | git-scm | git | 2.28.0 | Yes |
| Operating System | fedoraproject | fedora | 32 | Yes |
| Operating System | fedoraproject | fedora | 33 | Yes |
| Operating System | fedoraproject | fedora | 34 | Yes |
| Application | apple | xcode | < 12.5 | Yes |
| Operating System | apple | macos | ≥ 11.0 | No |
| Operating System | debian | debian_linux | 10.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For git-scm's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.