CVE-2009-1959
MEDIUM · CVSS 5.0EPSS 8.4%EU EUVD
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-189
- EPSS score
- 8.4% (95th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-1954)
- Published
- June 8, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-1954 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- irssi / irssi
References
- http://bugs.irssi.org/index.php?do=details&task_id=662(Exploit, Vendor Advisory)
- 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(Exploit, Vendor Advisory)
- 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
- http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/(Exploit)
- https://exchange.xforce.ibmcloud.com/vulnerabilities/51184
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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