DSA-730-1 bzip2 -- race condition

Debian Security Advisory

DSA-730-1 bzip2 -- race condition

Date Reported:

27 May 2005

Affected Packages:

bzip2

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 303300.
In Mitre's CVE dictionary: CVE-2005-0953.

More information:

Imran Ghory discovered a race condition in bzip2, a high-quality block-sorting file compressor and decompressor. When decompressing a file in a directory an attacker has access to, bunzip2 could be tricked to set the file permissions to a different file the user has permissions to.

For the stable distribution (woody) this problem has been fixed in version 1.0.2-1.woody2.

For the testing distribution (sarge) this problem has been fixed in version 1.0.2-6.

For the unstable distribution (sid) this problem has been fixed in version 1.0.2-6.

We recommend that you upgrade your bzip2 packages.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Source:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2.dsc

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2.diff.gz

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2.orig.tar.gz

Alpha:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_alpha.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_alpha.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_alpha.deb

ARM:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_arm.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_arm.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_arm.deb

Intel IA-32:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_i386.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_i386.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_i386.deb

Intel IA-64:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_ia64.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_ia64.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_ia64.deb

HPPA:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_hppa.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_hppa.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_hppa.deb

Motorola 680x0:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_m68k.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_m68k.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_m68k.deb

Big endian MIPS:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_mips.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_mips.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_mips.deb

Little endian MIPS:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_mipsel.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_mipsel.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_mipsel.deb

PowerPC:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_powerpc.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_powerpc.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_powerpc.deb

IBM S/390:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_s390.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_s390.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_s390.deb

Sun Sparc:

http://security.debian.org/pool/updates/main/b/bzip2/bzip2_1.0.2-1.woody2_sparc.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-1.0_1.0.2-1.woody2_sparc.deb

http://security.debian.org/pool/updates/main/b/bzip2/libbz2-dev_1.0.2-1.woody2_sparc.deb

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