Detections
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Ubuntu 4.10 / 5.04 / 5.10 : libtasn1-2 vulnerability (USN-251-1)

high Nessus Plugin ID 21060

Synopsis

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

Description

Evgeny Legerov discovered a buffer overflow in the DER format decoding function of the libtasn library. This library is mainly used by the GNU TLS library; by sending a specially crafted X.509 certificate to a server which uses TLS encryption/authentication, a remote attacker could exploit this to crash that server process and possibly even execute arbitrary code with the privileges of that server.

In order to fix the vulnerability in libtasn, several internal function signatures had to be changed; some of these functions are used by the GNU TLS library, so that library needs to be updated as well.

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 packages.

Plugin Details

Severity: High

ID: 21060

File Name: ubuntu_USN-251-1.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: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:5.04, p-cpe:/a:canonical:ubuntu_linux:libgnutls-doc, p-cpe:/a:canonical:ubuntu_linux:libgnutls10-dev, p-cpe:/a:canonical:ubuntu_linux:libtasn1-2, cpe:/o:canonical:ubuntu_linux:5.10, p-cpe:/a:canonical:ubuntu_linux:gnutls-bin, p-cpe:/a:canonical:ubuntu_linux:libtasn1-2-dev, cpe:/o:canonical:ubuntu_linux:4.10, p-cpe:/a:canonical:ubuntu_linux:libgnutls11-dev, p-cpe:/a:canonical:ubuntu_linux:libgnutls11-dbg, p-cpe:/a:canonical:ubuntu_linux:libgnutls10, p-cpe:/a:canonical:ubuntu_linux:libgnutls11

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/16/2006

Vulnerability Publication Date: 2/9/2006

Reference Information

CVE: CVE-2006-0645

USN: 251-1