GLSA 201801-10: LibXfont, LibXfont2: Arbitrary file access

Severity:normal
Title:LibXfont, LibXfont2: Arbitrary file access
Date:01/08/2018
Bugs: #639064
ID:201801-10

Synopsis

A vulnerability has been found in LibXfont and LibXfont2 which may allow for arbitrary file access.

Background

X.Org Xfont library.

Affected packages

Package Vulnerable Unaffected Architecture(s)
x11-libs/libXfont2 < 2.0.3 >= 2.0.3 All supported architectures
x11-libs/libXfont < 1.5.4 >= 1.5.4 All supported architectures

Description

It was discovered that libXfont incorrectly followed symlinks when opening font files.

Impact

A local unprivileged user could use this flaw to cause the X server to access arbitrary files, including special device files.

Workaround

There is no known workaround at this time.

Resolution

All LibXfont users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.5.4"
    

All LibXfont2 users should upgrade to the latest version:

# emerge --sync # emerge --ask --oneshot --verbose ">=x11-libs/libXfont2-2.0.3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201801-10.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

License

Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

Thank you!