CVE-2023-4759

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-4759
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4759.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-4759
Aliases
Related
Published
2023-09-12T10:15:29Z
Modified
2024-09-18T03:25:42.838742Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / jgit

Package

Name
jgit
Purl
pkg:deb/debian/jgit?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.11.9-1
4.11.9-2

6.*

6.7.0-1
6.7.0-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / jgit

Package

Name
jgit
Purl
pkg:deb/debian/jgit?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.11.9-2

6.*

6.7.0-1
6.7.0-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / jgit

Package

Name
jgit
Purl
pkg:deb/debian/jgit?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.7.0-1

Affected versions

4.*

4.11.9-2

Ecosystem specific

{
    "urgency": "not yet assigned"
}