CVE-2017-13722
First published: Wed Oct 11 2017(Updated: )
In the pcfGetProperties function in bitmap/pcfread.c in libXfont through 1.5.2 and 2.x before 2.0.2, a missing boundary check (for PCF files) could be used by local attackers authenticated to an Xserver for a buffer over-read, for information disclosure or a crash of the X server.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Libxfont | <=1.5.2 | |
| Red Hat Libxfont | =2.0.0 | |
| Red Hat Libxfont | =2.0.1 |
Remedy
https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=672bb944311392e2415b39c0d63b1e1902905bcd
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Reference Links
- https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=672bb944311392e2415b39c0d63b1e1902905bcd
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1500695
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1500694
- https://bugzilla.redhat.com/show_bug.cgi?id=1500693
- http://www.debian.org/security/2017/dsa-3995
- https://bugzilla.suse.com/show_bug.cgi?id=1049692
- https://security.gentoo.org/glsa/201711-08
- https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2
Frequently Asked Questions
What is the severity of CVE-2017-13722?
CVE-2017-13722 has a moderate severity rating due to its potential for buffer over-read and information disclosure.
How do I fix CVE-2017-13722?
To fix CVE-2017-13722, update libXfont to version 2.0.2 or later.
Who is affected by CVE-2017-13722?
CVE-2017-13722 affects users of libXfont versions 1.5.2 and below, as well as 2.0.0 and 2.0.1.
What can happen if CVE-2017-13722 is exploited?
Exploitation of CVE-2017-13722 can lead to information disclosure or a crash of the X server.
Is CVE-2017-13722 exploitable remotely?
CVE-2017-13722 is only exploitable by local attackers who are authenticated to an Xserver.
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