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CVE-2017-13720

Status Candidate

Overview

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 '�' characters are incorrectly skipped in situations involving ? characters.

Related Files

Gentoo Linux Security Advisory 201711-08
Posted Nov 12, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201711-8 - Multiple vulnerabilities have been found in LibXfont and Libxfont2, the worst of which could allow attackers to cause a Denial of Service condition. Versions less than 2.0.2 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2017-13720, CVE-2017-13722
MD5 | b6811418901205931336ce5fd511f0c0
Debian Security Advisory 3995-1
Posted Oct 11, 2017
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3995-1 - Two vulnerabilities were found in libXfont, the X11 font rasterisation library, which could result in denial of service or memory disclosure.

tags | advisory, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2017-13720, CVE-2017-13722
MD5 | ba82f824d37820a05b7370f92a3f6d64
Ubuntu Security Notice USN-3442-1
Posted Oct 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3442-1 - It was discovered that libXfont incorrectly handled certain patterns in PatternMatch. A local attacker could use this issue to cause libXfont to crash, resulting in a denial of service, or possibly obtain sensitive information. It was discovered that libXfont incorrectly handled certain malformed PCF files. A local attacker could use this issue to cause libXfont to crash, resulting in a denial of service, or possibly obtain sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2017-13720, CVE-2017-13722
MD5 | f1b96fa2976eb69edd55a904b06a7e78
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