VulnerabilityModified

CVE-2017-13720

HIGH 7.1EPSS 0.44%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.0: 7.1 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS: 0.44% probability · 37th percentile
CISA KEV: Not listed
Weakness: CWE-125
Affected: x.org/libxfont
Source: cve@mitre.org

References

http://www.debian.org/security/2017/dsa-3995
https://bugzilla.redhat.com/show_bug.cgi?id=1500690Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1054285Issue Tracking, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608Patch, Third Party Advisory
https://security.gentoo.org/glsa/201711-08
https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2Vendor Advisory
http://www.debian.org/security/2017/dsa-3995
https://bugzilla.redhat.com/show_bug.cgi?id=1500690Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1054285Issue Tracking, Third Party Advisory
https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608Patch, Third Party Advisory
https://security.gentoo.org/glsa/201711-08
https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.