GLSA-200603-08 : GnuPG: Incorrect signature verification

medium Nessus Plugin ID 21046

Synopsis

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

Description

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.

Solution

All GnuPG users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-crypt/gnupg-1.4.2.2'

Plugin Details

Severity: Medium

ID: 21046

File Name: gentoo_GLSA-200603-08.nasl

Version: 1.15

Type: local

Family: Gentoo Local Security Checks

Published: 3/13/2006

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

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: 3/10/2006

Reference Information

CVE: CVE-2006-0049

GLSA: 200603-08

Detections

Analytics