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[Full-disclosure] [SECURITY] [DSA 1870-1] New pidgin packages fix arbitrary code execution

To: debian-security-announce@xxxxxxxxxxxxxxxx
Subject: [Full-disclosure] [SECURITY] [DSA 1870-1] New pidgin packages fix arbitrary code execution
From: Nico Golde <nion@xxxxxxxxxx>
Date: Thu, 20 Aug 2009 00:29:43 +0200
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- --------------------------------------------------------------------------
Debian Security Advisory DSA-1870-1                    security@xxxxxxxxxx
http://www.debian.org/security/                                 Nico Golde
August 19th, 2009                       http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : pidgin
Vulnerability  : insufficient input validation
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2009-2694

Federico Muttis discovered that libpurple, the shared library that adds
support for various instant messaging networks to the pidgin IM client, is
vulnerable to a heap-based buffer overflow.  This issue exists because of
an incomplete fix for CVE-2008-2927 and CVE-2009-1376.  An attacker can
exploit this by sending two consecutive SLP packets to a victim via MSN.

The first packet is used to create an SLP message object with an offset of
zero, the second packet then contains a crafted offset which hits the
vulnerable code originally fixed in CVE-2008-2927 and CVE-2009-1376 and
allows an attacker to execute arbitrary code.

Note: Users with the "Allow only the users below" setting are not vulnerable
      to this attack. If you can't install the below updates you may want to
      set this via Tools->Privacy.


For the stable distribution (lenny), this problem has been fixed in
version 2.4.3-4lenny3.

For the testing distribution (squeeze), this problem will be fixed soon.

For the unstable distribution (sid), this problem has been fixed in
version 2.5.9-1.

We recommend that you upgrade your pidgin packages.

Upgrade instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 5.0 alias lenny
- --------------------------------

Debian (stable)
- ---------------

Stable updates are available for alpha, amd64, arm, armel, hppa, i386, ia64, 
mips, mipsel, powerpc, s390 and sparc.

Source archives:

  http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3.orig.tar.gz
    Size/MD5 checksum: 13123610 d0e0bd218fbc67df8b2eca2f21fcd427
  http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3.dsc
    Size/MD5 checksum:     1784 e9bc246ba4f0ca8dab1436d66bd00adb
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3.diff.gz
    Size/MD5 checksum:    67928 545981a43e8c1b905ea1adb0da9b1b4d

Architecture independent packages:

  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple-bin_2.4.3-4lenny3_all.deb
    Size/MD5 checksum:   133552 d4adb0ff7da09da14d34f3ae9484ea94
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-data_2.4.3-4lenny3_all.deb
    Size/MD5 checksum:  7018488 09b2f817c71774e2108b4366602f5dcf
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple-dev_2.4.3-4lenny3_all.deb
    Size/MD5 checksum:   276890 dab9b30c46f9a2c03af02d381cb029cf
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dev_2.4.3-4lenny3_all.deb
    Size/MD5 checksum:   354146 291a984ea00f92d67a3d0b99040d7d72
  
http://security.debian.org/pool/updates/main/p/pidgin/finch-dev_2.4.3-4lenny3_all.deb
    Size/MD5 checksum:   159388 f73823fb36f1d0487cc29d0d71a7a471

alpha architecture (DEC Alpha)

  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_alpha.deb
    Size/MD5 checksum:   369628 cd01f407199d1ca84f2502c4f4d169db
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_alpha.deb
    Size/MD5 checksum:   779192 fdb6b047a48f3c255fa13a329dc5fc35
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_alpha.deb
    Size/MD5 checksum:  5545960 fe294dfeb4dd7ca7ff6e5636230c856c
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_alpha.deb
    Size/MD5 checksum:  1803004 81ef9e0af747f0b236b25b1407d38266

amd64 architecture (AMD x86_64 (AMD64))

  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_amd64.deb
    Size/MD5 checksum:   345894 4b31436a96b5834d8ebe3639b837093d
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_amd64.deb
    Size/MD5 checksum:  5668550 58b27242ababd545a49b080527cd8769
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_amd64.deb
    Size/MD5 checksum:   722220 e249e5fb7581ec28a0f4e0a32fab3d2c
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_amd64.deb
    Size/MD5 checksum:  1706142 2f1f823ff5c26eb1cc67874633a6891d

arm architecture (ARM)

  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_arm.deb
    Size/MD5 checksum:   315182 d935ef53df9f333d0b2eb8d38e2bb753
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_arm.deb
    Size/MD5 checksum:   655088 8631310cc8beb7902fef81b51af01fd8
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_arm.deb
    Size/MD5 checksum:  1490226 cfe0d6727f4a9aa671a3413817fb11ae
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_arm.deb
    Size/MD5 checksum:  5348504 d1ef7ddf61f0e44f46c646e4f4add280

armel architecture (ARM EABI)

  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_armel.deb
    Size/MD5 checksum:  5386792 c5d2643ba6bc47aa41de04b870bbca3d
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_armel.deb
    Size/MD5 checksum:   666444 507fd3b558360b054d67843f3dba2689
  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_armel.deb
    Size/MD5 checksum:   318828 fcaea331f126eb2329bf54d0c8df7269
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_armel.deb
    Size/MD5 checksum:  1496868 1ac8d58c00019b1b0a3d742d4a02d074

hppa architecture (HP PA RISC)

  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_hppa.deb
    Size/MD5 checksum:   361112 366c71f9035322402a6c0bae4fe4d8a0
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_hppa.deb
    Size/MD5 checksum:  5489632 53fed112a1e8642c0f682fc29f361a4a
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_hppa.deb
    Size/MD5 checksum:  1827630 14a3a37c121b1e13c031f8894c5f4f64
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_hppa.deb
    Size/MD5 checksum:   753796 d50a7d1ba32773f791872bce6305b92c

i386 architecture (Intel ia32)

  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_i386.deb
    Size/MD5 checksum:  1584144 54aeb3d38dd0cae7e486dab84a82cbb8
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_i386.deb
    Size/MD5 checksum:   680948 8144b0b957e103cedd0a617e37a3feae
  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_i386.deb
    Size/MD5 checksum:   326656 4d75eb89954a304b036d5f14e751f72a
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_i386.deb
    Size/MD5 checksum:  5374132 2640104cb54145afda5a685607a1e74c

ia64 architecture (Intel ia64)

  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_ia64.deb
    Size/MD5 checksum:  5223582 02aa16c2f23681d9123f0fe35e3414fd
  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_ia64.deb
    Size/MD5 checksum:   434672 fcc166e5359603ec5a02953f36b30e33
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_ia64.deb
    Size/MD5 checksum:   948114 38eb5dfe87ba4ffa01ace8cf7db745c4
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_ia64.deb
    Size/MD5 checksum:  2194278 82db59131767124c1cef53a9ef03de9e

mips architecture (MIPS (Big Endian))

  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_mips.deb
    Size/MD5 checksum:  5655702 d2694b5874bccdc4bde1a2debf2f1ad7
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_mips.deb
    Size/MD5 checksum:   653944 c39d08c1fe964baa5c1ff533432f7c4d
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_mips.deb
    Size/MD5 checksum:  1373212 9673d5480375e78dae3741b32615e112
  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_mips.deb
    Size/MD5 checksum:   318262 aaff22798d1a88aa2d2e04b24b9a7932

powerpc architecture (PowerPC)

  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin-dbg_2.4.3-4lenny3_powerpc.deb
    Size/MD5 checksum:  5579128 be3d6412d3c5f41344f2b6a5a8f39bfe
  
http://security.debian.org/pool/updates/main/p/pidgin/pidgin_2.4.3-4lenny3_powerpc.deb
    Size/MD5 checksum:   753872 81133dbb351067d2d3ef6bbc136c106f
  
http://security.debian.org/pool/updates/main/p/pidgin/libpurple0_2.4.3-4lenny3_powerpc.deb
    Size/MD5 checksum:  1760422 379017e7d47927678f6b404aa4d12936
  
http://security.debian.org/pool/updates/main/p/pidgin/finch_2.4.3-4lenny3_powerpc.deb
    Size/MD5 checksum:   362944 f0cc1dea3b629fb34549d228599bd567


  These files will probably be moved into the stable distribution on
  its next update.

- 
---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security 
dists/stable/updates/main
Mailing list: debian-security-announce@xxxxxxxxxxxxxxxx
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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