CVE-2009-1959

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-06-08 · updated 2026-06-16
Weakness: CWE-189

Description

Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow.

Affected products

Irssi: 0.8.13

References

http://bugs.irssi.org/index.php?do=details&task_id=662
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
http://secunia.com/advisories/35685
http://secunia.com/advisories/35812
http://secunia.com/advisories/36152
http://www.irssi.org/ChangeLog
http://www.mandriva.com/security/advisories?name=MDVSA-2009:133
http://www.openwall.com/lists/oss-security/2009/05/29/3
http://www.securityfocus.com/bid/35399
http://www.securitytracker.com/id?1022410
http://www.ubuntu.com/usn/usn-800-1
http://www.vupen.com/english/advisories/2009/1596

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