(Conectiva Issues Fix) Libxml2 URL Parsing Buffer Overflow May Let Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1009616 |
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SecurityTracker URL: http://securitytracker.com/id/1009616
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CVE Reference:
CAN-2004-0110
(Links to External Site)
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Date: Apr 1 2004
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Impact:
Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 2.6.6
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Description:
A buffer overflow vulnerability was reported in Libxml2. A remote user may be able to execute arbitrary code on an application that uses Libxml2.
It is reported that there is an overflow in libxml2 that can be triggered when parsing remote resources via FTP or HTTP. A long URL can trigger the overflow, the report said.
The flaw reportedly resides in 'nanoftp.c' and 'nanohttp.c'
Yuuichi Teranishi is credited with discovering the flaw.
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Impact:
A remote user may be able to cause a target application that uses Libxml2 to execute arbitrary code with the privileges of the target application. The specific impact depends on the application using Libxml2.
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Solution:
Conectiva has released a fix.
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-devel-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-devel-static-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-doc-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libxml2-2.4.12-3U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-devel-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-devel-static-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-doc-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/libxml2-2.5.1-22050U90_1cl.src.rpm
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Vendor URL: www.xmlsoft.org/index.html (Links to External Site)
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Cause:
Boundary error
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Underlying OS:
Linux (Conectiva)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 31 Mar 2004 18:06:41 -0300
Subject: [conectiva-updates] [CLA-2004:836] Conectiva Security Announcement - libxml2
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
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CONECTIVA LINUX SECURITY ANNOUNCEMENT
- --------------------------------------------------------------------------
PACKAGE : libxml2
SUMMARY : Buffer overflow vulnerability
DATE : 2004-03-31 18:05:00
ID : CLA-2004:836
RELEVANT
RELEASES : 8, 9
- -------------------------------------------------------------------------
DESCRIPTION
The XML C library (libxml2) is used by many programs to load and save
extensible datastructures or to manipulate several kinds of XML
files.
This update fixes a buffer overflow vulnerability[1,2] in the URI
parsing code of the nanoftp and nanohttp modules of libxml2. An
attacker can exploit this vulnerability to execute arbitrary code
with the privileges of the user running an affected application.
Depending of the scenario where this application is used, this
vulnerability can be remotely exploitable.
SOLUTION
All users should update.
REFERENCES
1.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0110
2.http://www.securityfocus.com/bid/9718
UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-devel-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-devel-static-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/libxml2-doc-2.4.12-3U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/libxml2-2.4.12-3U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-devel-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-devel-static-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/RPMS/libxml2-doc-2.5.1-22050U90_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/9/SRPMS/libxml2-2.5.1-22050U90_1cl.src.rpm
ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:
- run: apt-get update
- after that, execute: apt-get upgrade
Detailed instructions regarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en
- -------------------------------------------------------------------------
All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
- -------------------------------------------------------------------------
All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en
- -------------------------------------------------------------------------
Copyright (c) 2004 Conectiva Inc.
http://www.conectiva.com
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subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
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