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Debian Security Advisory DSA 652-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
January 21st, 2005 http://www.debian.org/security/faq
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Package : unarj
Vulnerability : several
Problem-Type : local (remote)
Debian-specific: no
CVE ID : CAN-2004-0947 CAN-2004-1027
Debian Bug : 281922

Several vulnerabilities have been discovered in unarj, a non-free ARJ unarchive utility. The Common Vulnerabilities and Exposures Project identifies the following vulnerabilities:

CAN-2004-0947

A buffer overflow has been discovered when handling long file names contained in an archive. An attacker could create a specially crafted archive which could cause unarj to crash or possibly execute arbitrary code when being extracted by a victim.

CAN-2004-1027

A directory traversal vulnerability has been found so that an attacker could create a specially crafted archive which would create files in the parent directory when being extracted by a victim. When used recursively, this vulnerability could be used to overwrite critical system files and programs.

For the stable distribution (woody) these problems have been fixed in version 2.43-3woody1.

For the unstable distribution (sid) these problems don't apply since unstable/non-free does not contain the unarj package.

We recommend that you upgrade your unarj 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 3.0 alias woody
---------------------------------

Source archives:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1.dsc
Size/MD5 checksum: 528 e1d166f2eaf315641d1269a32ad1dc76
http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1.diff.gz
Size/MD5 checksum: 12903 4ef4cfad33d05ecc048d63596ab2673c
http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43.orig.tar.gz
Size/MD5 checksum: 39620 7a481dc017f1fbfa7f937a97e66eb99f

Alpha architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_alpha.deb
Size/MD5 checksum: 29668 08dc91afd3146ccdfaa51d73f8be56e5

ARM architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_arm.deb
Size/MD5 checksum: 22784 ed352d363cbeb34ba2268db63a632824

Intel IA-32 architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_i386.deb
Size/MD5 checksum: 20690 aa9490bd82bc9aef4f6092d19fa83eaa

Intel IA-64 architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_ia64.deb
Size/MD5 checksum: 31072 0b1f0403cfaaf572399fcb60b2549664

HP Precision architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_hppa.deb
Size/MD5 checksum: 23888 15a8d6b0b7b565186398c0b8ebe3eb6a

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_m68k.deb
Size/MD5 checksum: 20384 644a6dcc9f566bad384c050bc8b8fb14

PowerPC architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_powerpc.deb
Size/MD5 checksum: 23060 5c5a1f0157aa613337f80b439e78456f

IBM S/390 architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_s390.deb
Size/MD5 checksum: 22668 97dc977c8217a10d4915ee32db49edd5

Sun Sparc architecture:

http://security.debian.org/pool/updates/non-free/u/unarj/unarj_2.43-3woody1_sparc.deb
Size/MD5 checksum: 25386 bd2210a978ad30306e3db2ab112c87e8


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