CVE-2023-4759 (GCVE-0-2023-4759)

Vulnerability from cvelistv5 – Published: 2023-09-12 09:12 – Updated: 2024-08-02 07:37
VLAI
Title
Improper handling of case insensitive filesystems in Eclipse JGit allows arbitrary file write
Summary
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.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-19 03:55 UTC
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-178 - Improper Handling of Case Sensitivity
Assigner
eclipse CNA under the mitre root
CNA scorecard C 66/100 over 221 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Eclipse Foundation Eclipse JGit Affected: 0.0.0 , ≤ 6.6.0.202305301015-r (semver)
Unaffected: 5.13.3.202401111512-r
guessed Create a notification for this product.
eclipse jgit Affected: 0 , ≤ 6.6.0.202305301015-r (semver)
    cpe:2.3:a:eclipse:jgit:*:*:*:*:*:*:*:*
Create a notification for this product.
eclipse jgit Unaffected: 5.13.3.202401111512-r
    cpe:2.3:a:eclipse:jgit:5.13.3.202401111512-r:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2023-09-12 10:00
Credits
RyotaK
Show details on NVD website
To clipboard 

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Workarounds

CNA · eclipse
Setting git configuration option core.symlinks = false before checking out avoids the problem.

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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.