CVE-2025-27553

NameCVE-2025-27553
DescriptionRelative Path Traversal vulnerability in Apache Commons VFS before 2.10.0. The FileObject API in Commons VFS has a 'resolveFile' method that takes a 'scope' parameter. Specifying 'NameScope.DESCENDENT' promises that "an exception is thrown if the resolved file is not a descendent of the base file". However, when the path contains encoded ".." characters (for example, "%2E%2E/bar.txt"), it might return file objects that are not a descendent of the base file, without throwing an exception. This issue affects Apache Commons VFS: before 2.10.0. Users are recommended to upgrade to version 2.10.0, which fixes the issue.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4111-1
Debian Bugs1101204

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
commons-vfs (PTS)bullseye2.1-2vulnerable
bullseye (security)2.1-2+deb11u1fixed
bookworm2.1-4vulnerable
trixie, sid2.1-5fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
commons-vfssourcebullseye2.1-2+deb11u1DLA-4111-1
commons-vfssource(unstable)2.1-51101204

Notes

https://www.openwall.com/lists/oss-security/2025/03/23/1
Fixed by: https://github.com/apache/commons-vfs/commit/83d815afad4057234d9f928f6f00701bb7b51e86 (commons-vfs-2.10.0-RC1)
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