Otkriveni su i ispravljeni brojni nedostaci programskog paketa Expat koje udaljeni zlonamjerni korisnici mogu iskoristiti za izvođenje napada uskraćivanjem usluge (eng. Denial of Service, DoS).
Paket:
expat 2.x
Operacijski sustavi:
Gentoo Linux
Kritičnost:
5
Problem:
neodgovarajuće rukovanje memorijom, pogreška u programskoj funkciji, pogreška u programskoj komponenti
Problemi su posljedica pogrešaka u funkcijama "big2_toUtf8" i "updatePosition", datotekama "xmlparse.c" i "readfilemap.c" te gubljenja memorije u funkciji "poolGrow".
Posljedica:
Propuste je moguće iskoristiti za izvođenje DoS napada pomoću posebno oblikovane XML datoteke.
Rješenje:
Svim korisnicima se savjetuje korištenje nadogradnje koja otklanja opisane propuste.
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Gentoo Linux Security Advisory GLSA 201209-06
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http://security.gentoo.org/
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Severity: Normal
Title: Expat: Multiple vulnerabilities
Date: September 24, 2012
Bugs: #280615, #303727, #407519
ID: 201209-06
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Synopsis
========
Multiple vulnerabilities have been found in Expat, possibly resulting
in Denial of Service.
Background
==========
Expat is a set of XML parsing libraries.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/expat < 2.1.0_beta3 >= 2.1.0_beta3
Description
===========
Multiple vulnerabilities have been discovered in Expat. Please review
the CVE identifiers referenced below for details.
Impact
======
A remote attacker could entice a user to open a specially crafted XML
file in an application linked against Expat, possibly resulting in a
Denial of Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Expat users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/expat-2.1.0_beta3"
Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying some of these
packages.
References
==========
[ 1 ] CVE-2009-3560
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3560
[ 2 ] CVE-2009-3720
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3720
[ 3 ] CVE-2012-0876
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0876
[ 4 ] CVE-2012-1147
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1147
[ 5 ] CVE-2012-1148
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1148
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-201209-06.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite. or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
=======
Copyright 2012 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
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