Articles / SuSE: New zlib packages fix…

SuSE: New zlib packages fix remote denial of service

A denial of service condition was fixed in the zlib library. Any program using zlib to decompress data can be crashed by a specially handcrafted invalid data stream. This includes web browsers or email programs able to view PNG images (which are compressed by zlib), allowing remote attackers to crash browser sessions or potentially anti virus programs using this vulnerability. Fixed packages are available from ftp.suse.com.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

______________________________________________________________________________

                       SUSE Security Announcement

       Package:                zlib
       Announcement ID:        SUSE-SA:2005:039
       Date:                   Wed, 06 Jul 2005 14:00:00 +0000
       Affected Products:      9.1, 9.2, 9.3
                               SUSE Linux Enterprise Server 9
                               Novell Linux Desktop 9
                               Open Enterprise Server
       Vulnerability Type:     remote denial of service
       Severity (1-10):        7
       SUSE Default Package:   yes
       Cross-References:       CAN-2005-2096

   Content of This Advisory:
       1) Security Vulnerability Resolved:
            zlib denial of service attack
          Problem Description
       2) Solution or Work-Around
       3) Special Instructions and Notes
       4) Package Location and Checksums
       5) Pending Vulnerabilities, Solutions, and Work-Arounds:
           See SUSE Security Summary Report.
       6) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Problem Description and Brief Discussion

  A denial of service condition was fixed in the zlib library.

  Any program using zlib to decompress data can be crashed by a specially
  handcrafted invalid data stream. This includes web browsers or email
  programs able to view PNG images (which are compressed by zlib),
  allowing remote attackers to crash browser sessions or potentially
  anti virus programs using this vulnerability.

  This issue is tracked by the Mitre CVE ID CAN-2005-2096.

  Since only zlib 1.2.x is affected, older SUSE products are not affected
  by this problem.

2) Solution or Work-Around

  Install the updated packages.

3) Special Instructions and Notes

  Please restart running programs using zlib.

4) Package Location and Checksums

  The preferred method for installing security updates is to use the YaST
  Online Update (YOU) tool. YOU detects which updates are required and
  automatically performs the necessary steps to verify and install them.
  Alternatively, download the update packages for your distribution manually
  and verify their integrity by the methods listed in Section 6 of this
  announcement. Then install the packages using the command

    rpm -Fhv 

  to apply the update, replacing  with the filename of the
  downloaded RPM package.

  Our maintenance customers are notified individually. The packages are
  offered for installation from the maintenance web.


  x86 Platform:

  SUSE Linux 9.3:
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/zlib-1.2.2-5.2.i586.rpm
         69306a26b2f9cbaadd139adafe8ec4ac
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/zlib-devel-1.2.2-5.2.i586.rpm
         e8f2b4dd7ac1a58850ceb78f806167fc
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/zlib-32bit-9.3-7.1.x86_64.rpm
         08a77c7932298f449c1a82808f254110
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/zlib-devel-32bit-9.3-7.1.x86_64.rpm
         5855d394fa83bd00e63c3dd921696ea3

  SUSE Linux 9.2:
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/zlib-1.2.1-74.2.i586.rpm
         8f9d09a2d49a351261f4b31eeee7e4cd
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/zlib-devel-1.2.1-74.2.i586.rpm
         2143442ba3f12fa0d76be2fa98b1db8a
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/zlib-32bit-9.2-200507042003.x86_64.rpm
         4850236d95a259a406e4d4d6c93b8859
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/zlib-devel-32bit-9.2-200507042003.x86_64.rpm
         1d559edb263577bff25d1016777ebb55

  SUSE Linux 9.1:
  ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/zlib-1.2.1-70.9.i586.rpm
         51e2ae37c32d4979d1da05b667289640
  ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/zlib-devel-1.2.1-70.9.i586.rpm
         3a7fd561f637ecfcf2f3b5118e48327a
  ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/i586/zlib-32bit-9.1-200507042050.i586.rpm
         8070a09339374edeb50cf1d72249964f
  ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/i586/zlib-devel-32bit-9.1-200507042050.i586.rpm
         91d1551e541e00e4bfefff68afc7ed8f
  source rpm(s):
  ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/zlib-1.2.1-70.9.src.rpm
         c2cf9d2d338d44ab0af7cc4612053ef6

  x86-64 Platform:

  SUSE Linux 9.3:
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/zlib-1.2.2-5.2.x86_64.rpm
         9d76d7e17c4bd39b76671ae085667e68
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/zlib-devel-1.2.2-5.2.x86_64.rpm
         cc3090fe5ec5abbe7db63cb8f2191643
  source rpm(s):
  ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/zlib-1.2.2-5.2.src.rpm
         3a5b7b89f1cafe11d6650e45c15105a9

  SUSE Linux 9.2:
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/zlib-1.2.1-74.2.x86_64.rpm
         f479591a07c85f3a4eddaefdaead314b
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/zlib-devel-1.2.1-74.2.x86_64.rpm
         e95130cc47899b7d7e82f2ef9dfcbbd9
  source rpm(s):
  ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/zlib-1.2.1-74.2.src.rpm
         416613c25a05f474fb146c2c5bd12ee0

  SUSE Linux 9.1:
  ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/zlib-1.2.1-70.9.x86_64.rpm
         acd231a2cbe98589b5e76b07837885c8
  ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/zlib-devel-1.2.1-70.9.x86_64.rpm
         a2c9ae2e48b5bf6b1612ff2d06e3bd4c
  source rpm(s):
  ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/zlib-1.2.1-70.9.src.rpm
         fa552f93abcc60e00686185c2b33fa98


______________________________________________________________________________

5) Pending Vulnerabilities, Solutions, and Work-Arounds:

  See SUSE Security Summary Report.
______________________________________________________________________________

6) Authenticity Verification and Additional Information

 - Announcement authenticity verification:

   SUSE security announcements are published via mailing lists and on Web
   sites. The authenticity and integrity of a SUSE security announcement is
   guaranteed by a cryptographic signature in each announcement. All SUSE
   security announcements are published with a valid signature.

   To verify the signature of the announcement, save it as text into a file
   and run the command

     gpg --verify 

   replacing  with the name of the file where you saved the
   announcement. The output for a valid signature looks like:

     gpg: Signature made  using RSA key ID 3D25D3D9
     gpg: Good signature from "SuSE Security Team "

   where  is replaced by the date the document was signed.

   If the security team's key is not contained in your key ring, you can
   import it from the first installation CD. To import the key, use the
   command

     gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

 - Package authenticity verification:

   SUSE update packages are available on many mirror FTP servers all over the
   world. While this service is considered valuable and important to the free
   and open source software community, the authenticity and the integrity of
   a package needs to be verified to ensure that it has not been tampered
   with.

   There are two verification methods that can be used independently from
   each other to prove the authenticity of a downloaded file or RPM package:

   1) Using the internal gpg signatures of the rpm package
   2) MD5 checksums as provided in this announcement

   1) The internal rpm package signatures provide an easy way to verify the
      authenticity of an RPM package. Use the command

       rpm -v --checksig 

      to verify the signature of the package, replacing  with the
      filename of the RPM package downloaded. The package is unmodified if it
      contains a valid signature from build@suse.de with the key ID 9C800ACA.

      This key is automatically imported into the RPM database (on
      RPMv4-based distributions) and the gpg key ring of 'root' during
      installation. You can also find it on the first installation CD and at
      the end of this announcement.

   2) If you need an alternative means of verification, use the md5sum
      command to verify the authenticity of the packages. Execute the command

        md5sum 

      after you downloaded the file from a SUSE FTP server or its mirrors.
      Then compare the resulting md5sum with the one that is listed in the
      SUSE security announcement. Because the announcement containing the
      checksums is cryptographically signed (by security@suse.de), the
      checksums show proof of the authenticity of the package if the
      signature of the announcement is valid. Note that the md5 sums
      published in the SUSE Security Announcements are valid for the
      respective packages only. Newer versions of these packages cannot be
      verified.

 - SUSE runs two security mailing lists to which any interested party may
   subscribe:

   suse-security@suse.com
       -   General Linux and SUSE security discussion.
           All SUSE security announcements are sent to this list.
           To subscribe, send an e-mail to
               .

   suse-security-announce@suse.com
       -   SUSE's announce-only mailing list.
           Only SUSE's security announcements are sent to this list.
           To subscribe, send an e-mail to
               .

   For general information or the frequently asked questions (FAQ),
   send mail to  or
   .

   =====================================================================
   SUSE's security contact is  or .
   The  public key is listed below.
   =====================================================================
______________________________________________________________________________

   The information in this advisory may be distributed or reproduced,
   provided that the advisory is not modified in any way. In particular, the
   clear text signature should show proof of the authenticity of the text.

   SUSE Linux Products GmbH provides no warranties of any kind whatsoever
   with respect to the information contained in this security advisory.

Type Bits/KeyID    Date       User ID
pub  2048R/3D25D3D9 1999-03-06 SuSE Security Team 
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key 

- -----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org
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=LRKC
- -----END PGP PUBLIC KEY BLOCK-----

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (GNU/Linux)

iQEVAwUBQsv4A3ey5gA9JdPZAQL1rwf9GCahHB5rNFrHDFGnl2jda6PsvCzITk8C
yLNp3B5LWf/q5GA5HdijeWppwwRABwyEB/tacnlvClT9FSnuFFr1FTr0ZaC7fBzn
rQO+utKXZSWC9fumdIamSII9LoMvUS+DWNAPdUhBYzpIqDl8EzFxvMpJuCQE2qye
E4XR9kVzFsaxGHnhA+gy9Crz1foKi5o7ulydSvyARH5oMsuNxnCMgkEC6XqEX1Ao
2hIVASMGpQ1G4EVE+vbfySXMZUnG9UOtbvL/C75G787h83Zlt7ONUjSfFammR5D+
PbvWT9qx+Qg9C0zvEGHl4O8w4NM+vilFeFoywH3BGvtVeWfQt9n2EA==
=fHUf
-----END PGP SIGNATURE-----
Screenshot

Project Spotlight

Kigo Video Converter Ultimate for Mac

A tool for converting and editing videos.

Screenshot

Project Spotlight

Kid3

An efficient tagger for MP3, Ogg/Vorbis, and FLAC files.