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Debian: gnupg Crytographic weakness

Date 18 Feb 2004

Category Debian Linux Distribution - Security Advisories

2709

Posted By LinuxSecurity Advisories

Phong Nguyen identified a severe bug in the way GnuPG creates and usesElGamal keys for signing.


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Debian Security Advisory DSA 429-2                     This email address is being protected from spambots. You need JavaScript enabled to view it. 
https://www.debian.org/security/                             Matt Zimmerman
February 13th, 2004                      https://www.debian.org/security/faq
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Package        : gnupg
Vulnerability  : cryptographic weakness
Problem-Type   : local
Debian-specific: no
CVE Ids        : CAN-2003-0971

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.

The update provided in DSA 459-1 disables the use of this type of key,
using an interim fix.  This update, DSA 459-2, implements a more
correct and permanent fix provided by David Shaw.

For the current stable distribution (woody) this problem has been
fixed in version 1.0.6-4woody3.

We recommend that you update your gnupg package.

Upgrade Instructions
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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
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  Source archives:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3.dsc
      Size/MD5 checksum:      577 f5a742233c584754c479daf7dfe58a9e
     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3.diff.gz
      Size/MD5 checksum:     5262 1ecf9f459e0b05c31128adac05ef2fe4
     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6.orig.tar.gz
      Size/MD5 checksum:  1941676 7c319a9e5e70ad9bc3bf0d7b5008a508

  Alpha architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_alpha.deb
      Size/MD5 checksum:  1150082 724d4fcb6f2ff0969b5ceba82e8aabe5

  ARM architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_arm.deb
      Size/MD5 checksum:   986748 8efdbc409f140c1aaefadb97646944d6

  Intel IA-32 architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_i386.deb
      Size/MD5 checksum:   966408 50e5e44b2efa34d7c7d3a8fd630dc96a

  Intel IA-64 architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_ia64.deb
      Size/MD5 checksum:  1271406 4c5e77defc13bf4bae3d11431257e6a3

  HP Precision architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_hppa.deb
      Size/MD5 checksum:  1058822 02516b6984cf695ef31c970980d36864

  Motorola 680x0 architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_m68k.deb
      Size/MD5 checksum:   942188 ed7d9d16820608b3172be64f6b470b97

  Big endian MIPS architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_mips.deb
      Size/MD5 checksum:  1035630 9b25dd3f06580549bfa93ee429605d0e

  Little endian MIPS architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_mipsel.deb
      Size/MD5 checksum:  1035864 740243a767cc1ff53f116d0e97aa66a7

  PowerPC architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_powerpc.deb
      Size/MD5 checksum:  1009152 678b2fc28d01eac452d96f925d2d40b2

  IBM S/390 architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_s390.deb
      Size/MD5 checksum:  1001666 c5a70add4dfa1cb3828d9892513d3c15

  Sun Sparc architecture:

     https://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody3_sparc.deb
      Size/MD5 checksum:  1003634 32490333505f1804e9fcf4a786fbc293

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

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