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Ubuntu 4.10 / 5.04 / 5.10 : gnupg vulnerability (USN-252-1)

medium Nessus Plugin ID 21071

Synopsis

The remote Ubuntu host is missing a security-related patch.

Description

Tavis Ormandy discovered a potential weakness in the signature verification of gnupg. gpgv and gpg --verify returned a successful exit code even if the checked file did not have any signature at all.
The recommended way of checking the result is to evaluate the status messages, but some third-party applications might just check the exit code for determining whether or not a signature is valid. These applications could be tricked into erroneously reporting a valid signature.

Please note that this does not affect the Ubuntu package signature checks.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected gnupg package.

Plugin Details

Severity: Medium

ID: 21071

File Name: ubuntu_USN-252-1.nasl

Version: 1.16

Type: local

Agent: unix

Published: 3/13/2006

Updated: 1/19/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, 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: cpe:/o:canonical:ubuntu_linux:5.10, cpe:/o:canonical:ubuntu_linux:4.10, cpe:/o:canonical:ubuntu_linux:5.04, p-cpe:/a:canonical:ubuntu_linux:gnupg

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 2/17/2006

Vulnerability Publication Date: 2/15/2006

Reference Information

CVE: CVE-2006-0455

USN: 252-1