DSA-429-1 gnupg -- cryptographic weakness

Debian Security Advisory

DSA-429-1 gnupg -- cryptographic weakness

Date Reported:

26 Jan 2004

Affected Packages:

gnupg

Vulnerable:

Yes

Security database references:

In the Bugtraq database (at SecurityFocus): BugTraq ID 9115.
In Mitre's CVE dictionary: CVE-2003-0971.

More information:

Phong Nguyen identified a severe bug in the way GnuPG creates and uses ElGamal keys for signing. This is a significant security failure which can lead to a compromise of almost all ElGamal keys used for signing.

This update disables the use of this type of key.

For the current stable distribution (woody) this problem has been fixed in version 1.0.6-4woody1.

For the unstable distribution, this problem has been fixed in version 1.2.4-1.

We recommend that you update your gnupg package.

Fixed in:

Debian GNU/Linux 3.0 (woody)

Source:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1.dsc

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1.diff.gz

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6.orig.tar.gz

Alpha:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_alpha.deb

ARM:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_arm.deb

Intel IA-32:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_i386.deb

Intel IA-64:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_ia64.deb

HPPA:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_hppa.deb

Motorola 680x0:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_m68k.deb

Big endian MIPS:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_mips.deb

PowerPC:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_powerpc.deb

IBM S/390:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_s390.deb

Sun Sparc:

http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody1_sparc.deb

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