# CVE-2023-4759: jgit: Arbitrary File Overwrite in Eclipse JGit <= 6.6.0  In Eclipse JGit, all versions <= 6.6.0.202305301015-r, a symbolic...

CVE-2023-4759 is fixed in jgit on 1 platform, first by DEBIAN-CVE-2023-4759, released September 12, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-4759
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0219
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 12, 2023

## Description

Arbitrary File Overwrite in Eclipse JGit <= 6.6.0  In Eclipse JGit, all versions <= 6.6.0.202305301015-r, a symbolic link present in a specially crafted git repository can be used to write a file to locations outside the working tree when this repository is cloned with JGit to a case-insensitive filesystem, or when a checkout from a clone of such a repository is performed on a case-insensitive filesystem.  This can happen on checkout (DirCacheCheckout), merge (ResolveMerger via its WorkingTreeUpdater), pull (PullCommand using merge), and when applying a patch (PatchApplier). This can be exploited for remote code execution (RCE), for instance if the file written outside the working tree is a git filter that gets executed on a subsequent git command.  The issue occurs only on case-insensitive filesystems, like the default filesystems on Windows and macOS. The user performing the clone or checkout must have the rights to create symbolic links for the problem to occur, and symbolic links must be enabled in the git configuration.  Setting git configuration option core.symlinks = false before checking out avoids the problem.  The issue was fixed in Eclipse JGit version 6.6.1.202309021850-r and 6.7.0.202309050840-r, available via  Maven Central https://repo1.maven.org/maven2/org/eclipse/jgit/  and  repo.eclipse.org https://repo.eclipse.org/content/repositories/jgit-releases/ . A backport is available in 5.13.3 starting from  5.13.3.202401111512-r.   The JGit maintainers would like to thank RyotaK for finding and reporting this issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | jgit Debian 13.5 (trixie) | 6.7.0-1 | [DEBIAN-CVE-2023-4759](https://patchblox.com/security/data/fix/linux/debian-cve-2023-4759.md) | Sep 12, 2023 |
| Linux | jgit Debian 14 | 6.7.0-1 | [DEBIAN-CVE-2023-4759](https://patchblox.com/security/data/fix/linux/debian-cve-2023-4759.md) | Sep 12, 2023 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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