Bug 1096601 – CVE-2014-0211 libXfont: integer overflows calculating memory needs for xfs replies

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Bug 1096601 - (CVE-2014-0211) CVE-2014-0211 libXfont: integer overflows calculating memory needs for xfs replies

Summary:	CVE-2014-0211 libXfont: integer overflows calculating memory needs for xfs re...

Status:	CLOSED ERRATA

Aliases:	CVE-2014-0211

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20140513,repor...
Keywords:	Security

Depends On:	1097397 1163601 1163602 1163603 1163604 1165521
Blocks:	1096603
	Show dependency tree / graph

Reported:	2014-05-12 02:40 EDT by Huzaifa S. Sidhpurwala
Modified:	2015-11-25 05:19 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:	libXfont 1.4.8, libXfont 1.4.99.901 (1.5.0rc1)
Doc Type:	Bug Fix
Doc Text:	Multiple out-of-bounds write flaws were found in the way libXfont parsed replies received from an X.org font server. A malicious X.org server could cause an X client to crash or, possibly, execute arbitrary code with the privileges of the X.Org server.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-11-25 02:47:09 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2014:1870	normal	SHIPPED_LIVE	Important: libXfont security update	2014-11-18 11:41:52 EST
Red Hat Product Errata	RHSA-2014:1893	normal	SHIPPED_LIVE	Important: libXfont security update	2014-11-24 20:57:06 EST

Groups: None (edit)

Description Huzaifa S. Sidhpurwala 2014-05-12 02:40:14 EDT

When parsing replies received from the font server, these calls do not check that their calculations for how much memory is needed to handle the returned data have not overflowed, so can result in allocating too little memory and then writing the returned data past the end of the allocated buffer.

Affected functions: fs_get_reply(), fs_alloc_glyphs(),
fs_read_extent_info()


Acknowledgements:

Red Hat would like to thank the X.org project for reporting this issue. Upstream acknowledges Ilja van Sprundel as the original reporter of this issue.

Comment 1 Vincent Danen 2014-05-13 13:40:46 EDT

Upstream commits:

http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=a42f707f8a62973f5e8bbcd08afb10a79e9cee33
http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=c578408c1fd4db09e4e3173f8a9e65c81cc187c1
http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=0f1a5d372c143f91a602bdf10c917d7eabaee09b


External Reference:

http://lists.x.org/archives/xorg-announce/2014-May/002431.html

Comment 2 Vincent Danen 2014-05-13 13:44:52 EDT

Created libXfont tracking bugs for this issue:

Affects: fedora-all [bug 1097397]

Comment 3 Vincent Danen 2014-05-27 14:11:46 EDT

Statement:

(none)

Comment 4 Fedora Update System 2014-07-15 22:01:10 EDT

libXfont-1.4.8-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2014-07-22 23:01:32 EDT

libXfont-1.4.8-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 errata-xmlrpc 2014-11-18 06:42:15 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2014:1870 https://rhn.redhat.com/errata/RHSA-2014-1870.html

Comment 10 Martin Prpič 2014-11-19 03:18:19 EST

IssueDescription:

Multiple out-of-bounds write flaws were found in the way libXfont parsed replies received from an X.org font server. A malicious X.org server could cause an X client to crash or, possibly, execute arbitrary code with the privileges of the X.Org server.

Comment 11 errata-xmlrpc 2014-11-24 15:57:50 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:1893 https://rhn.redhat.com/errata/RHSA-2014-1893.html

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