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Mandrake: 'zlib' Denial of service vulnerability Print E-mail
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Posted by LinuxSecurity.com Team   
Mandrake This vulnerability can be used to perform Denial of Service attacks and, quite possibly, the execution of arbitrary code on the affected system.

________________________________________________________________________

                Mandrake Linux Security Update Advisory
________________________________________________________________________

Package name:           zlib
Advisory ID:            MDKSA-2002:022
Date:                   March 12th, 2002
Affected versions:      7.1, 7.2, 8.0, 8.1, Corporate Server 1.0.1,
                        Single Network Firewall 7.2
________________________________________________________________________

Problem Description:

 Matthias Clasen found a security issue in zlib that, when provided with
 certain input, causes zlib to free an area of memory twice.  This
 "double free" bug can be used to crash any programs that take untrusted
 compressed input, such as web browsers, email clients, image viewing
 software, etc.  This vulnerability can be used to perform Denial of
 Service attacks and, quite possibly, the execution of arbitrary code on
 the affected system.

 MandrakeSoft has published two advisories concerning this incident:

   MDKSA-2002:022 - zlib
   MDKSA-2002:023 - packages containing zlib

 The second advisory contains additional packages that bring their own
 copies of the zlib source, and as such need to be fixed and rebuilt.
 Updating the zlib library is sufficient to protect those programs that
 use the system zlib, but the packages as noted in MDKSA-2002:023 will
 need to be updated for those packages that do not use the system zlib.
________________________________________________________________________

References:

  http://www.kb.cert.org/vuls/id/368819
________________________________________________________________________

Updated Packages:

 Linux-Mandrake 7.1:
 7921c049e634ae5bde97e963aa47d22b  7.1/RPMS/zlib-1.1.3-11.1mdk.i586.rpm
 5146bc0863db8692475887884d4ee66a  7.1/RPMS/zlib-devel-1.1.3-11.1mdk.i586.rpm
 2e24e2958c0663378635ede5f8ca4d83  7.1/SRPMS/zlib-1.1.3-11.1mdk.src.rpm

 Linux-Mandrake 7.2:
 e23855800a5f9933217e6c94f2c93069  7.2/RPMS/zlib-1.1.3-11.1mdk.i586.rpm
 f39c0455f8d0ae276cb5417dcfb3aa00  7.2/RPMS/zlib-devel-1.1.3-11.1mdk.i586.rpm
 2e24e2958c0663378635ede5f8ca4d83  7.2/SRPMS/zlib-1.1.3-11.1mdk.src.rpm

 Mandrake Linux 8.0:
 58775896267f0454e554578c732e685c  8.0/RPMS/zlib1-1.1.3-16.1mdk.i586.rpm
 8917338feb592dad773cb6b3feac0d91  8.0/RPMS/zlib1-devel-1.1.3-16.1mdk.i586.rpm
 582b5dd80b2ff9f24ed274fbc82c5c19  8.0/SRPMS/zlib-1.1.3-16.1mdk.src.rpm

 Mandrake Linux 8.0/ppc:
 939ed423af6fc514e4bde2dfc519ea13  ppc/8.0/RPMS/zlib1-1.1.3-16.1mdk.ppc.rpm
 f8efcbf6e55e2774fbd98b67ffe9838f  ppc/8.0/RPMS/zlib1-devel-1.1.3-16.1mdk.ppc.rpm
 582b5dd80b2ff9f24ed274fbc82c5c19  ppc/8.0/SRPMS/zlib-1.1.3-16.1mdk.src.rpm

 Mandrake Linux 8.1:
 6dca9c0ff7dac9759d735150139182da  8.1/RPMS/zlib1-1.1.3-16.1mdk.i586.rpm
 320d06d5f1acc841965ad6c16db396cf  8.1/RPMS/zlib1-devel-1.1.3-16.1mdk.i586.rpm
 582b5dd80b2ff9f24ed274fbc82c5c19  8.1/SRPMS/zlib-1.1.3-16.1mdk.src.rpm

 Mandrake Linux 8.1/ia64:
 c25baf28293b0619fad97c863e953103  ia64/8.1/RPMS/zlib1-1.1.3-16.1mdk.ia64.rpm
 10000858776526410b0d3526f1157909  ia64/8.1/RPMS/zlib1-devel-1.1.3-16.1mdk.ia64.rpm
 582b5dd80b2ff9f24ed274fbc82c5c19  ia64/8.1/SRPMS/zlib-1.1.3-16.1mdk.src.rpm

 Corporate Server 1.0.1:
 7921c049e634ae5bde97e963aa47d22b  1.0.1/RPMS/zlib-1.1.3-11.1mdk.i586.rpm
 5146bc0863db8692475887884d4ee66a  1.0.1/RPMS/zlib-devel-1.1.3-11.1mdk.i586.rpm
 2e24e2958c0663378635ede5f8ca4d83  1.0.1/SRPMS/zlib-1.1.3-11.1mdk.src.rpm

 Single Network Firewall 7.2:
 e23855800a5f9933217e6c94f2c93069  snf7.2/RPMS/zlib-1.1.3-11.1mdk.i586.rpm
 f39c0455f8d0ae276cb5417dcfb3aa00  snf7.2/RPMS/zlib-devel-1.1.3-11.1mdk.i586.rpm
 2e24e2958c0663378635ede5f8ca4d83  snf7.2/SRPMS/zlib-1.1.3-11.1mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):

________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.  The verification of md5
checksums and GPG signatures is performed automatically for you.

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".  A list of
FTP mirrors can be obtained from:

   http://www.mandrakesecure.net/en/ftp.php

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:

  rpm --checksig 

All packages are signed by MandrakeSoft for security.  You can obtain
the GPG public key of the Mandrake Linux Security Team from:

  https://www.mandrakesecure.net/RPM-GPG-KEYS

Please be aware that sometimes it takes the mirrors a few hours to
update.

You can view other update advisories for Mandrake Linux at:

   http://www.mandrakesecure.net/en/advisories/

MandrakeSoft has several security-related mailing list services that
anyone can subscribe to.  Information on these lists can be obtained by
visiting:

   http://www.mandrakesecure.net/en/mlist.php

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
________________________________________________________________________

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security@linux-mandrake.com>


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Version: GnuPG v1.0.5 (GNU/Linux)
Comment: For info see  http://www.gnupg.org

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