CVE-2009-1959 EXPLOIT
5.0
MEDIUM · CVSS 2.0 · EPSS 8.4% (pctl 95)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 5.0 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| EPSS | 8.39% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-189 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2009-06-08 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| irssi | irssi |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Irssi 0.8.13 - 'WALLOPS' Message Off-by-One Heap Memory Corruption | 2009-05-15 |
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
- http://xorl.wordpress.com/2009/05/28/irssi-event_wallops-off-by-one-readwrite/
- https://exchange.xforce.ibmcloud.com/vulnerabilities/51184
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00146.html
- 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
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