Improper Input Validation Affecting libXfont2 package, versions *
Threat Intelligence
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Start learning- Snyk IDSNYK-CENTOS7-LIBXFONT2-1976901
- published26 Jul 2021
- disclosed4 Oct 2017
Introduced: 4 Oct 2017
CVE-2017-13720 (opens in a new tab)How to fix?
There is no fixed version for Centos:7 libXfont2.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libXfont2 package and not the libXfont2 package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1500690
- https://bugzilla.suse.com/show_bug.cgi?id=1054285
- https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608
- https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2
- https://access.redhat.com/security/cve/CVE-2017-13720
- http://www.debian.org/security/2017/dsa-3995
- https://security.gentoo.org/glsa/201711-08