GLSA-200602-10 : GnuPG: Incorrect signature verification

medium Nessus Plugin ID 20938

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-200602-10 (GnuPG: Incorrect signature verification)

Tavis Ormandy of the Gentoo Linux Security Auditing Team discovered that automated systems relying on the return code of GnuPG or gpgv to authenticate digital signatures may be misled by malformed signatures. GnuPG documentation states that a return code of zero (0) indicates success, however gpg and gpgv may also return zero if no signature data was found in a detached signature file.
Impact :

An attacker may be able to bypass authentication in automated systems relying on the return code of gpg or gpgv to authenticate digital signatures.
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-1.4.2.1'

Plugin Details

Severity: Medium

ID: 20938

File Name: gentoo_GLSA-200602-10.nasl

Version: 1.16

Type: local

Family: Gentoo Local Security Checks

Published: 2/19/2006

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: Medium

Base Score: 4.6

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

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: 2/18/2006

Reference Information

CVE: CVE-2006-0455

GLSA: 200602-10

Detections

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