Ubuntu 8.04 LTS / 8.10 / 9.04 / 9.10 : irssi vulnerabilities (USN-929-1)

Medium Nessus Plugin ID 45551


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


It was discovered that irssi did not perform certificate host validation when using SSL connections. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. (CVE-2010-1155)

Aurelien Delaitre discovered that irssi could be made to dereference a NULL pointer when a user left the channel. A remote attacker could cause a denial of service via application crash. (CVE-2010-1156)

This update also adds SSLv3 and TLSv1 support, while disabling the old, insecure SSLv2 protocol.

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 irssi and / or irssi-dev packages.

Plugin Details

Severity: Medium

ID: 45551

File Name: ubuntu_USN-929-1.nasl

Version: $Revision: 1.9 $

Type: local

Agent: unix

Published: 2010/04/16

Modified: 2017/08/16

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.8

Temporal Score: 5.6

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:irssi, p-cpe:/a:canonical:ubuntu_linux:irssi-dev, cpe:/o:canonical:ubuntu_linux:8.04:-:lts, cpe:/o:canonical:ubuntu_linux:8.10, cpe:/o:canonical:ubuntu_linux:9.04, cpe:/o:canonical:ubuntu_linux:9.10

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2010/04/15

Reference Information

CVE: CVE-2010-1155, CVE-2010-1156

OSVDB: 63888, 63889

USN: 929-1