title: Git vulnerable to local clone-based data exfiltration with non-local transports
description: Git is a revision control system. Using a specially-crafted repository, Git prior to versions 2.39.2, 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7, and 2.30.8 can be tricked into using its local clone optimization even when using a non-local transport. Though Git will abort local clones whose source `$GIT_DIR/objects` directory contains symbolic links, the `objects` directory itself may still be a symbolic link. These two may be combined to include arbitrary files based on known paths on the victim's filesystem within the malicious repository's working copy, allowing for data exfiltration in a similar manner as CVE-2022-39253.
A fix has been prepared and will appear in v2.39.2 v2.38.4 v2.37.6 v2.36.5 v2.35.7 v2.34.7 v2.33.7 v2.32.6, v2.31.7 and v2.30.8. If upgrading is impractical, two short-term workarounds are available. Avoid cloning repositories from untrusted sources with `--recurse-submodules`. Instead, consider cloning repositories without recursively cloning their submodules, and instead run `git submodule update` at each layer. Before doing so, inspect each new `.gitmodules` file to ensure that it does not contain suspicious module URLs.
problem types: CWE-59: Improper Link Resolution Before File Access ('Link Following')
affected:
{
vendor: git
product: git
versions:
version: >= 2.39.0, < 2.39.2, status: affected
version: >= 2.38.0, < 2.38.4, status: affected
version: >= 2.37.0, < 2.37.6, status: affected
version: >= 2.36.0, < 2.36.5, status: affected
version: >= 2.35.0, < 2.35.7, status: affected
version: >= 2.34.0, < 2.34.7, status: affected
version: >= 2.33.0, < 2.33.7, status: affected
version: >= 2.32.0, < 2.32.6, status: affected
version: >= 2.31.0, < 2.31.7, status: affected
version: < 2.30.8, status: affected
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 5.5
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
version: 3.1
]