Mandrake alert: Updated gnupg packages fix vulnerability with ElGamal signing keys
A severe vulnerability was discovered in GnuPG by Phong Nguyen relating to ElGamal sign+encrypt keys. From Werner Koch's email message:
-----BEGIN PGP SIGNED MESSAGE-----
Mandrake Linux Security Update Advisory
Package name: gnupg
Advisory ID: MDKSA-2003:109
Date: November 28th, 2003
Affected versions: 9.0, 9.1, 9.2, Corporate Server 2.1,
Multi Network Firewall 8.2
A severe vulnerability was discovered in GnuPG by Phong Nguyen
relating to ElGamal sign+encrypt keys. From Werner Koch's email
"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. Note that this is a real world vulnerability which will
reveal your private key within a few seconds.
Please *take immediate action and revoke your ElGamal signing keys*.
Furthermore you should take whatever measures necessary to limit the
damage done for signed or encrypted documents using that key."
"Note that the standard keys as generated by GnuPG (DSA and ElGamal
encryption) as well as RSA keys are NOT vulnerable. Note also that
ElGamal signing keys cannot be generated without the use of a special
flag to enable hidden options and even then overriding a warning
message about this key type. See below for details on how to identify
MandrakeSoft urges any users who use the ElGamal sign+encrypt keys to
immediately revoke these keys and discontinue use of them. Updated
packages are provided that remove the ability to create these keys and
to create signatures using these keys (thanks to David Shaw for
writing the patch).
Corporate Server 2.1:
Corporate Server 2.1/x86_64:
Mandrake Linux 9.0:
Mandrake Linux 9.1:
Mandrake Linux 9.1/PPC:
Mandrake Linux 9.2:
Multi Network Firewall 8.2:
To upgrade automatically use MandrakeUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.
A list of FTP mirrors can be obtained from:
All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team by executing:
gpg --recv-keys --keyserver http://www.mandrakesecure.net 0x22458A98
Please be aware that sometimes it takes the mirrors a few hours to
You can view other update advisories for Mandrake Linux at:
MandrakeSoft has several security-related mailing list services that
anyone can subscribe to. Information on these lists can be obtained by
If you want to report vulnerabilities, please contact
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.7 (GNU/Linux)
-----END PGP SIGNATURE-----
This topic does not have any threads posted yet!
You cannot post until you login.