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[gentoo-announce] GLSA: gnupg (200312-05)
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masseya
Bodhisattva
Bodhisattva


Joined: 17 Apr 2002
Posts: 2602
Location: Raleigh, NC

PostPosted: Fri Dec 12, 2003 3:17 pm    Post subject: [gentoo-announce] GLSA: gnupg (200312-05) Reply with quote

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


- --------------------------------------------------------------------------
GENTOO LINUX SECURITY ANNOUNCEMENT 200312-05
- --------------------------------------------------------------------------

GLSA: 200312-05
Package: app-crypt/gnupg
Summary: GnuPG ElGamal signing keys compromised and
format string vulnerability
Severity: minimal
Gentoo bug: 34504, 35639
Date: 2003-12-12
CVE: CAN-2003-0971, CAN-2003-0978
Exploit: unknown
Affected: <=1.2.3-r4
Fixed: >=1.2.3-r5


DESCRIPTION:

Two flaws have been found in GnuPG 1.2.3.

First, ElGamal signing keys can be compromised. These keys are not
commonly used. Quote from
<http://lists.gnupg.org/pipermail/gnupg-announce/2003q4/000276.html>:

"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."

Second, there is a format string flaw in the 'gpgkeys_hkp' utility
which "would allow a malicious keyserver in the worst case to execute
an arbitrary code on the user's machine." See
<http://www.s-quadra.com/advisories/Adv-20031203.txt> for
details.


SOLUTION:

All users who have created ElGamal signing keys should immediately
revoke them. Then, all Gentoo Linux machines with gnupg installed
should be updated to use gnupg-1.2.3-r5 or higher.

emerge sync
emerge -pv '>=app-crypt/gnupg-1.2.3-r5'
emerge '>=app-crypt/gnupg-1.2.3-r5'
emerge clean


// end

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Version: GnuPG v1.2.3 (Darwin)

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0gaONEybmmq0x4/vJheoXwg=
=F5DR
-----END PGP SIGNATURE-----
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