7.1
HIGH
CVE-2017-13720
libXfont Pattern Match Buffer Over-read
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.

INFO

Published Date :

Oct. 11, 2017, 5:29 p.m.

Last Modified :

Nov. 13, 2017, 2:29 a.m.

Remotely Exploitable :

No

Impact Score :

5.2

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2017-13720 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 X.org libxfont
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2017-13720.

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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-13720 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2017-13720 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 13, 2017

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/201711-08 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 05, 2017

    Action Type Old Value New Value
    Added Reference http://www.debian.org/security/2017/dsa-3995 [No Types Assigned]
  • Initial Analysis by [email protected]

    Nov. 03, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:L/AC:L/Au:N/C:P/I:N/A:P)
    Added CVSS V3 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1500690 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1500690 Issue Tracking, Third Party Advisory
    Changed Reference Type https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608 No Types Assigned https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608 Patch, Third Party Advisory
    Changed Reference Type https://bugzilla.suse.com/show_bug.cgi?id=1054285 No Types Assigned https://bugzilla.suse.com/show_bug.cgi?id=1054285 Issue Tracking, Third Party Advisory
    Changed Reference Type https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2 No Types Assigned https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2 Vendor Advisory
    Added CWE CWE-125
    Added CPE Configuration OR *cpe:2.3:a:x.org:libxfont:1.5.2:*:*:*:*:*:*:* (and previous) *cpe:2.3:a:x.org:libxfont:2.0.0:*:*:*:*:*:*:* *cpe:2.3:a:x.org:libxfont:2.0.1:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-13720 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2017-13720 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.06 }} 0.00%

score

0.24592

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability