CVE-2017-13720

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 v3.0 7.1 HIGH
CVSS v2.0 3.6 LOW

7.1^/10

CVSS v3.0 : HIGH

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

3.6^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:P/I:N/A:P

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2	Vendor Advisory
https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608	Patch Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1054285	Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1500690	Issue Tracking Third Party Advisory
http://www.debian.org/security/2017/dsa-3995
https://security.gentoo.org/glsa/201711-08

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:x.org:libxfont:2.0.0:::::::*
	cpe:2.3:a:x.org:libxfont:2.0.1:::::::*
	cpe:2.3:a:x.org:libxfont::::::::

Information

Published : 2017-10-11 10:29

Updated : 2017-11-12 18:29

NVD link : CVE-2017-13720

Mitre link : CVE-2017-13720

JSON object : View

CWE

CWE-125

Out-of-bounds Read

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Products Affected

x.org

libxfont

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