GLSA-200603-08 : GnuPG: Incorrect signature verification

Medium Nessus Plugin ID 21046


The remote Gentoo host is missing one or more security-related patches.


The remote host is affected by the vulnerability described in GLSA-200603-08 (GnuPG: Incorrect signature verification)

OpenPGP is the standard that defines the format of digital signatures supported by GnuPG. OpenPGP signatures consist of multiple sections, in a strictly defined order. Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that certain illegal signature formats could allow signed data to be modified without detection. GnuPG has previously attempted to be lenient when processing malformed or legacy signature formats, but this has now been found to be insecure.
Impact :

A remote attacker may be able to construct or modify a digitally-signed message, potentially allowing them to bypass authentication systems, or impersonate another user.
Workaround :

There is no known workaround at this time.


All GnuPG users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-crypt/gnupg-'

See Also

Plugin Details

Severity: Medium

ID: 21046

File Name: gentoo_GLSA-200603-08.nasl

Version: $Revision: 1.11 $

Type: local

Published: 2006/03/13

Modified: 2015/04/13

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:gnupg, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 2006/03/10

Vulnerability Publication Date: 2006/03/09

Reference Information

CVE: CVE-2006-0049

OSVDB: 23790

GLSA: 200603-08