A remotely exploitable off-by-one error leading to a heap overflow was found in irssi which might result in the execution of arbitrary code.
|Package||net-irc/irssi on all architectures|
|Affected versions||< 0.8.13-r1|
|Unaffected versions||>= 0.8.13-r1|
irssi is a modular textUI IRC client with IPv6 support.
Nemo discovered an off-by-one error leading to a heap overflow in irssi's event_wallops() parsing function.
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.
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"
September 12, 2009
September 12, 2009: 01