CVE-2009-1959

N/A Unknown
Published: June 08, 2009 Modified: April 23, 2026
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://bugs.irssi.org/index.php?do=details&task_id=662
Source: cve@mitre.org
Exploit Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
Source: cve@mitre.org
http://secunia.com/advisories/35685
Source: cve@mitre.org
http://secunia.com/advisories/35812
Source: cve@mitre.org
http://secunia.com/advisories/36152
Source: cve@mitre.org
http://www.irssi.org/ChangeLog
Source: cve@mitre.org
Exploit Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:133
Source: cve@mitre.org
http://www.openwall.com/lists/oss-security/2009/05/29/3
Source: cve@mitre.org
http://www.securityfocus.com/bid/35399
Source: cve@mitre.org
http://www.securitytracker.com/id?1022410
Source: cve@mitre.org
http://www.ubuntu.com/usn/usn-800-1
Source: cve@mitre.org
http://www.vupen.com/english/advisories/2009/1596
Source: cve@mitre.org
http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/
Source: cve@mitre.org
Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/51184
Source: cve@mitre.org
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html
Source: cve@mitre.org
http://bugs.irssi.org/index.php?do=details&task_id=662
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://secunia.com/advisories/35685
Source: af854a3a-2127-422b-91ae-364da2661108
http://secunia.com/advisories/35812
Source: af854a3a-2127-422b-91ae-364da2661108
http://secunia.com/advisories/36152
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.irssi.org/ChangeLog
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:133
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2009/05/29/3
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securityfocus.com/bid/35399
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securitytracker.com/id?1022410
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/usn-800-1
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.vupen.com/english/advisories/2009/1596
Source: af854a3a-2127-422b-91ae-364da2661108
http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/51184
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html
Source: af854a3a-2127-422b-91ae-364da2661108

30 reference(s) from NVD

Quick Stats

CVSS v3 Score
N/A / 10.0
EPSS (Exploit Probability)
6.9%
91th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-189

Affected Vendors

irssi

Related CVEs

CVE-2026-7024 5.4
CVE-2026-7023 6.3
CVE-2026-7022 7.3
CVE-2026-7021 3.5
CVE-2026-7020 5.6