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Mandrake: gzip insecure tmp file vulnerability Print E-mail
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Posted by Team   
Mandrake A vulnerability exists in znew, a script included with gzip, that would create temporary files without taking precautions to avoid a symlink attack.


                Mandrake Linux Security Update Advisory

Package name:           gzip
Advisory ID:            MDKSA-2003:068
Date:                   June 16th, 2003

Affected versions:	8.2, 9.0, 9.1, Corporate Server 2.1,
			Multi Network Firewall 8.2

Problem Description:

 A vulnerability exists in znew, a script included with gzip, that
 would create temporary files without taking precautions to avoid a
 symlink attack.  Patches have been applied to make use of mktemp to
 generate unique filenames, and properly make use of noclobber in the
 script.  Likewise, a fix for gzexe which had been applied previously
 was incomplete.  It has been fixed to make full use of mktemp
 everywhere a temporary file is created.
 The znew problem was initially reported by Michal Zalewski and was
 again reported more recently to Debian by Paul Szabo.


Updated Packages:
 Corporate Server 2.1:
 3e7bff9e74dfacdb5708fdf60b8f18c6  corporate/2.1/RPMS/gzip-1.2.4a-11.2mdk.i586.rpm
 ddf940b835e0718d80840694b65067bc  corporate/2.1/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

 Mandrake Linux 8.2:
 e114d1ff62fe8456d945a11d91362855  8.2/RPMS/gzip-1.2.4a-11.2mdk.i586.rpm
 ddf940b835e0718d80840694b65067bc  8.2/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

 Mandrake Linux 8.2/PPC:
 0d290a3f2a22396bcc5a6fc7c77aaeaa  ppc/8.2/RPMS/gzip-1.2.4a-11.2mdk.ppc.rpm
 ddf940b835e0718d80840694b65067bc  ppc/8.2/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

 Mandrake Linux 9.0:
 3e7bff9e74dfacdb5708fdf60b8f18c6  9.0/RPMS/gzip-1.2.4a-11.2mdk.i586.rpm
 ddf940b835e0718d80840694b65067bc  9.0/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

 Mandrake Linux 9.1:
 fe732815834057c64e3c4e311ee9462d  9.1/RPMS/gzip-1.2.4a-11.2mdk.i586.rpm
 ddf940b835e0718d80840694b65067bc  9.1/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

 Mandrake Linux 9.1/PPC:
 c4947b2e7a4de6f2e72c038e953a402f  ppc/9.1/RPMS/gzip-1.2.4a-11.2mdk.ppc.rpm
 ddf940b835e0718d80840694b65067bc  ppc/9.1/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

 Multi Network Firewall 8.2:
 e114d1ff62fe8456d945a11d91362855  mnf8.2/RPMS/gzip-1.2.4a-11.2mdk.i586.rpm
 ddf940b835e0718d80840694b65067bc  mnf8.2/SRPMS/gzip-1.2.4a-11.2mdk.src.rpm

Bug IDs fixed (see 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:

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:

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

You can view other update advisories for Mandrake Linux at:

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

If you want to report vulnerabilities, please contact

Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team

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