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Home » Hacking News » Debian - DSA 100-1 - gzip potential buffer overflow

Debian - DSA 100-1 - gzip potential buffer overflow

by Nikola Strahija on January 15th, 2002 GOBBLES found a buffer overflow in gzip that occurs when compressing files with really long filenames. Even though GOBBLES claims to have developed an exploit to take advantage of this bug, it has been said by others that this problem is not likely to be exploitable as other security incidents.


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Debian Security Advisory DSA 100-1 [email protected]
http://www.debian.org/security/ Martin Schulze
January 13th, 2002
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Package : gzip
Vulnerability : Potential buffer overflow
Problem-Type : local
Debian-specific: no

GOBBLES found a buffer overflow in gzip that occurs when compressing
files with really long filenames. Even though GOBBLES claims to have
developed an exploit to take advantage of this bug, it has been said
by others that this problem is not likely to be exploitable as other
security incidents.

Additionally, the Debian version of gzip from the stable release does
not segfault, and hence does not directly inherit this problem.
However, better be safe than sorry, so we have prepared an update for
you.

Please make sure you are running an up-to-date version from
stable/unstable/testing with at least version 1.2.4-33.

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 2.2 alias potato
-------------------------------------

Source archives:

http://security.debian.org/dists/stable/updates/main/source/gzip_1.2.4-33.1.diff.gz
MD5 checksum: e5669c5bbb138dbf1c522337aab58fc8
http://security.debian.org/dists/stable/updates/main/source/gzip_1.2.4-33.1.dsc
MD5 checksum: 55f3382aebcf5e1b83b3e4004864f15c
http://security.debian.org/dists/stable/updates/main/source/gzip_1.2.4.orig.tar.gz
MD5 checksum: b94b3e07797e0cbf3622bb2fe5682f0b

Alpha architecture:

http://security.debian.org/dists/stable/updates/main/binary-alpha/gzip_1.2.4-33.1_alpha.deb
MD5 checksum: 725078383b4716acf7bcf1bb85f2ab7d

ARM architecture:

http://security.debian.org/dists/stable/updates/main/binary-arm/gzip_1.2.4-33.1_arm.deb
MD5 checksum: 4d949c3e3e770384fae6feed805fd08b

Intel ia32 architecture:

http://security.debian.org/dists/stable/updates/main/binary-i386/gzip_1.2.4-33.1_i386.deb
MD5 checksum: b61176ee1953b528e50268995e6c2505

Motorola 680x0 architecture:

http://security.debian.org/dists/stable/updates/main/binary-m68k/gzip_1.2.4-33.1_m68k.deb
MD5 checksum: 61fb17bebf8ee72a087b13df4800d8e7

PowerPC architecture:

http://security.debian.org/dists/stable/updates/main/binary-powerpc/gzip_1.2.4-33.1_powerpc.deb
MD5 checksum: c59b537fed3dadc84d630b3033112781

Sun Sparc architecture:

http://security.debian.org/dists/stable/updates/main/binary-sparc/gzip_1.2.4-33.1_sparc.deb
MD5 checksum: d375736c6e46f185354b608ec11d5e0d


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

----------------------------------------------------------------------------------
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: [email protected]
Package info: `apt-cache show ' and http://packages.debian.org/

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