Linux Security
    Linux Security
    Linux Security

    Debian: gnupg Signing key vulnerability

    Date 26 Jan 2004
    Posted By LinuxSecurity Advisories
    This vulnerability can be used to trivially recover the private key.
    - --------------------------------------------------------------------------
    Debian Security Advisory DSA 429-1                     This email address is being protected from spambots. You need JavaScript enabled to view it.                             Matt Zimmerman
    January 26th, 2004             
    - --------------------------------------------------------------------------
    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
    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
    We recommend that you update your gnupg 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:
          Size/MD5 checksum:      577 ba605a24ce1f05d0b56a8365afcfbab7
          Size/MD5 checksum:     2651 547a67db2c9b39e9ca372bf163bc8883
          Size/MD5 checksum:  1941676 7c319a9e5e70ad9bc3bf0d7b5008a508
      Alpha architecture:
          Size/MD5 checksum:  1149782 35d9420faf6571b22109453fa0e707b7
      ARM architecture:
          Size/MD5 checksum:   986726 6d5a35f97bfc037667c787eeef818027
      Intel IA-32 architecture:
          Size/MD5 checksum:   966382 e4a2e973cbbde196e1cbddaecfcc1ef8
      Intel IA-64 architecture:
          Size/MD5 checksum:  1271170 c449638391c6ce357508c12256170282
      HP Precision architecture:
          Size/MD5 checksum:  1058492 a4db862a5e2e6dceada146bddc1fc913
      Motorola 680x0 architecture:
          Size/MD5 checksum:   941836 bbbd0cf2a910ab981e8ea31f4bf1efcf
      Big endian MIPS architecture:
          Size/MD5 checksum:  1035512 7a16602af5c5f59e2147753864f6dd83
      PowerPC architecture:
          Size/MD5 checksum:  1009118 c9fd5e6b0cc08b410214a1172f1434e6
      IBM S/390 architecture:
          Size/MD5 checksum:  1001546 ce633e93e4d2dbe7a279f60dbf9cd132
      Sun Sparc architecture:
          Size/MD5 checksum:  1003476 4ed36f1131cc8b3b472ffc72efd6f3df
      These files will probably be moved into the stable distribution on
      its next revision.

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