Articles / Debian: New gzip packages f…

Debian: New gzip packages fix arbitrary code execution

Tavis Ormandy from the Google Security Team discovered several vulnerabilities in gzip, the GNU compression utility. A null pointer dereference may lead to denial of service if gzip is used in an automated manner. Missing boundary checks may lead to stack modification, allowing execution of arbitrary code. A buffer underflow in the pack support code may lead to execution of arbitrary code. A buffer underflow in the LZH support code may lead to execution of arbitrary code. An infinite loop may lead to denial of service if gzip is used in an automated manner. Fixed packages are available from security.debian.org.
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Debian Security Advisory DSA 1181-1                    security@debian.org
http://www.debian.org/security/                         Moritz Muehlenhoff
September 19th, 2006                    http://www.debian.org/security/faq
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Package        : gzip
Vulnerability  : several
Problem-Type   : local(remote)
Debian-specific: no
CVE ID         : CVE-2006-4334 CVE-2006-4335 CVE-2006-4336 CVE-2006-4337 CVE-2006-4338

Tavis Ormandy from the Google Security Team discovered several
vulnerabilities in gzip, the GNU compression utility. The Common
Vulnerabilities and Exposures project identifies the following problems:

CVE-2006-4334

   A null pointer dereference may lead to denial of service if gzip is
   used in an automated manner.

CVE-2006-4335

   Missing boundary checks may lead to stack modification, allowing
   execution of arbitrary code.

CVE-2006-4336

   A buffer underflow in the pack support code may lead to execution of
   arbitrary code.

CVE-2006-4337

   A buffer underflow in the LZH support code may lead to execution of
   arbitrary code.

CVE-2006-4338

   An infinite loop may lead to denial of service if gzip is used in
   an automated manner.

For the stable distribution (sarge) these problems have been fixed in
version 1.3.5-10sarge2.

For the unstable distribution (sid) these problems have been fixed in
version 1.3.5-15.

We recommend that you upgrade your gzip package.


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 3.1 alias sarge
- --------------------------------

 Source archives:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2.dsc
     Size/MD5 checksum:      566 b4ef2a9e595a17f8596fdefb1f4b9bf6
   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2.diff.gz
     Size/MD5 checksum:    60478 cd1bec47a01d72c800f3bac85dfcc5f3
   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5.orig.tar.gz
     Size/MD5 checksum:   331550 3d6c191dfd2bf307014b421c12dc8469

 Alpha architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_alpha.deb
     Size/MD5 checksum:    83740 450c8d78aa9654ab651ac21115834432

 AMD64 architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_amd64.deb
     Size/MD5 checksum:    75370 cf8896b90d00dc8fce58ab1e88149674

 ARM architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_arm.deb
     Size/MD5 checksum:    76472 24b1723495120c89b9a1a55712fc557d

 HP Precision architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_hppa.deb
     Size/MD5 checksum:    79586 9a2d72859917de0f8b269ea95f392b2b

 Intel IA-32 architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_i386.deb
     Size/MD5 checksum:    71164 8267f1f753b0a2b380d149280b6e44bb

 Intel IA-64 architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_ia64.deb
     Size/MD5 checksum:    91588 30b9aa547cfacc09cee832a9b7516b6e

 Motorola 680x0 architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_m68k.deb
     Size/MD5 checksum:    69110 cf17c8d59a6204c2dce1828f2b1f24c6

 Big endian MIPS architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_mips.deb
     Size/MD5 checksum:    79488 e2242db1fb6e1c589a67658f96ba7f27

 Little endian MIPS architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_mipsel.deb
     Size/MD5 checksum:    79350 da63d665a88c29c6cf07b1ef3566ecd1

 PowerPC architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_powerpc.deb
     Size/MD5 checksum:    76948 12e742fd43b8325e89f3b96e0cdd89a6

 IBM S/390 architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_s390.deb
     Size/MD5 checksum:    77540 0e75950ede6c45a332eead6d71b7e7a2

 Sun Sparc architecture:

   http://security.debian.org/pool/updates/main/g/gzip/gzip_1.3.5-10sarge2_sparc.deb
     Size/MD5 checksum:    74654 471feed410766674a72327e58702febd


 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@lists.debian.org
Package info: `apt-cache show ' and http://packages.debian.org/
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