Bug 45621

Summary:	libxfont: Multiple issues (4.2)
Product:	UCS	Reporter:	Arvid Requate <requate>
Component:	Security updates	Assignee:	Philipp Hahn <hahn>
Status:	CLOSED FIXED	QA Contact:	Arvid Requate <requate>
Severity:	normal
Priority:	P5	Flags:	requate: Patch_Available+
Version:	UCS 4.2
Target Milestone:	UCS 4.2-3-errata
Hardware:	Other
OS:	Linux
What kind of report is it?:	Security Issue	What type of bug is this?:	---
Who will be affected by this bug?:	---	How will those affected feel about the bug?:	---
User Pain:		Enterprise Customer affected?:
School Customer affected?:		ISV affected?:
Waiting Support:		Flags outvoted (downgraded) after PO Review:
Ticket number:		Bug group (optional):
Max CVSS v3 score:	4 (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Bug Depends on:
Bug Blocks:	38068

Description Arvid Requate

2017-10-30 19:57:33 CET

Upstream Debian package version 1:1.5.1-1+deb8u1 fixes:

* 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. (CVE-2017-13720)

* In the pcfGetProperties function in bitmap/pcfread.c in libXfont through 1.5.2 and 2.x before 2.0.2, a missing boundary check (for PCF files) could be used by local attackers authenticated to an Xserver for a buffer over-read, for information disclosure or a crash of the X server. (CVE-2017-13722)

Comment 1 Philipp Hahn

2018-01-25 10:59:31 CET

Mass-import from Debian-Security:
  python -m univention.repong.^Cbmirror -s jessie -r 4.2-3 --override=$HOME/REPOS/repo-ng/mirror/update_ucs42_mirror_from_debian.yml --errata=doc/errata --sql --process=ALL -vvvv --now=201801211553

YAML: git:bd6159834a..449aa5a7cf

Comment 2 Quality Assurance

2018-05-04 16:57:40 CEST

--- mirror/ftp/4.2/unmaintained/4.2-0/source/libxfont_1.5.1-1.dsc
+++ apt/ucs_4.2-0-errata4.2-3/source/libxfont_1.5.1-1+deb8u1.dsc
@@ -1,3 +1,8 @@
+1:1.5.1-1+deb8u1 [Mon, 09 Oct 2017 18:30:05 +0200] Julien Cristau <jcristau@debian.org>:
+
+  * Check for end of string in PatternMatch (CVE-2017-13720)
+  * pcfGetProperties: Check string boundaries (CVE-2017-13722)
+
 1:1.5.1-1 [Tue, 17 Mar 2015 16:55:21 +0100] Julien Cristau <jcristau@debian.org>:
 
   * New upstream release

Comment 3 Arvid Requate

2018-05-08 12:03:55 CEST

* No UCS specific patches
* Comparison to previously shipped version ok
* Binary package update Ok
* Advisory adjusted:
  c9acb760f3 | Sort CVEs

Comment 4 Arvid Requate

2018-05-08 14:56:38 CEST

<http://errata.software-univention.de/ucs/4.2/360.html>