DSA-959-1 unalz -- buffer overflow

Debian Security Advisory

DSA-959-1 unalz -- buffer overflow

Date Reported:

30 Jan 2006

Affected Packages:

unalz

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 340842.
In Mitre's CVE dictionary: CVE-2005-3862.

More information:

Ulf Härnhammar from the Debian Security Audit Project discovered that unalz, a decompressor for ALZ archives, performs insufficient bounds checking when parsing file names. This can lead to arbitrary code execution if an attacker provides a crafted ALZ archive.

The old stable distribution (woody) does not contain unalz.

For the stable distribution (sarge) this problem has been fixed in version 0.30.1

For the unstable distribution (sid) this problem will be fixed soon.

We recommend that you upgrade your unalz package.

Fixed in:

Debian GNU/Linux 3.1 (sarge)

Source:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1.dsc

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1.tar.gz

Alpha:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_alpha.deb

AMD64:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_amd64.deb

ARM:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_arm.deb

Intel IA-32:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_i386.deb

Intel IA-64:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_ia64.deb

HPPA:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_hppa.deb

Motorola 680x0:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_m68k.deb

Big endian MIPS:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_mips.deb

Little endian MIPS:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_mipsel.deb

PowerPC:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_powerpc.deb

IBM S/390:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_s390.deb

Sun Sparc:

http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_sparc.deb

MD5 checksums of the listed files are available in the original advisory.