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CVE-2009-1959

MediumPublished

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)...

Published: Jun 6, 2009
Updated: Aug 7, 2024
Assigning CNA: mitre
Evidence observed: May 15, 2009

Primary CVSS

5.0/ 10Medium

nvd · CVSS 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS probability estimate

8.4%

Low · next 30 days

Percentile: 94.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Irssi 0.8.13 - 'WALLOPS' Message Off-by-One Heap Memory CorruptionExploit
nemo · linux · May 15, 2009

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