Ubuntu 10.04 LTS / 11.10 / 12.04 LTS / 12.10 : libssh vulnerabilities (USN-1640-1)

High Nessus Plugin ID 63058


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


Xi Wang and Florian Weimer discovered that libssh incorrectly handled memory. A remote attacker could use this to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2012-4559, CVE-2012-4560, CVE-2012-4561, CVE-2012-4562).

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.


Update the affected libssh-4 package.

Plugin Details

Severity: High

ID: 63058

File Name: ubuntu_USN-1640-1.nasl

Version: $Revision: 1.7 $

Type: local

Agent: unix

Published: 2012/11/27

Modified: 2016/05/25

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libssh-4, cpe:/o:canonical:ubuntu_linux:10.04:-:lts, cpe:/o:canonical:ubuntu_linux:11.10, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:12.10

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2012/11/26

Reference Information

CVE: CVE-2012-4559, CVE-2012-4560, CVE-2012-4561, CVE-2012-4562

BID: 56604

OSVDB: 87855, 87856, 87857, 87858, 88110

USN: 1640-1