CVE-2017-13720
First published: Wed Oct 11 2017(Updated: )
In the PatternMatch function in fontfile/fontdir.c in libXfont through 1.5.2 and 2.x before 2.0.2, an attacker with access to an X connection can cause a buffer over-read during pattern matching of fonts, leading to information disclosure or a crash (denial of service). This occurs because '\0' characters are incorrectly skipped in situations involving ? characters.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| X.Org libXfont | <=1.5.2 | |
| X.Org libXfont | =2.0.0 | |
| X.Org libXfont | =2.0.1 |
Remedy
https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608
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Reference Links
- https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608
- 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=1500690
- http://www.debian.org/security/2017/dsa-3995
- https://bugzilla.suse.com/show_bug.cgi?id=1054285
- https://security.gentoo.org/glsa/201711-08
- https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2
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- vendor/x.org
- canonical/x.org libxfont
- version/x.org libxfont/1.5.2
- version/x.org libxfont/2.0.0
- version/x.org libxfont/2.0.1