National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-13720 Detail

Current 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.

Source:  MITRE      Last Modified:  10/11/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-13720
Original release date:
10/11/2017
Last revised:
11/12/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
7.1 High
Vector:
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H (legend)
Impact Score:
5.2
Exploitability Score:
1.8
CVSS Version 3 Metrics:
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
None
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
3.6 LOW
Vector:
(AV:L/AC:L/Au:N/C:P/I:N/A:P) (legend)
Impact Subscore:
4.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Low
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

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