GLSA-200909-13 : irssi: Execution of arbitrary code

Medium Nessus Plugin ID 40960


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


The remote host is affected by the vulnerability described in GLSA-200909-13 (irssi: Execution of arbitrary code)

Nemo discovered an off-by-one error leading to a heap overflow in irssi's event_wallops() parsing function.
Impact :

A remote attacker might entice a user to connect to a malicious IRC server, use a man-in-the-middle attack to redirect a user to such a server or use ircop rights to send a specially crafted WALLOPS message, which might result in the execution of arbitrary code with the privileges of the user running irssi.
Workaround :

There is no known workaround at this time.


All irssi users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-irc/irssi-0.8.13-r1'

See Also

Plugin Details

Severity: Medium

ID: 40960

File Name: gentoo_GLSA-200909-13.nasl

Version: $Revision: 1.11 $

Type: local

Published: 2009/09/14

Modified: 2015/04/13

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.3

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

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

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:irssi, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2009/09/12

Reference Information

CVE: CVE-2009-1959

BID: 35399

OSVDB: 54977

GLSA: 200909-13

CWE: 189