CVE-2009-1789: Eggheads Eggdrop

Medium severity, CVSS 4.3. EPSS: 8.5% chance of exploitation in the next 30 days.

mod/server.mod/servmsg.c in Eggheads Eggdrop and Windrop 1.6.19 and earlier allows remote attackers to cause a denial of service (crash) via a crafted PRIVMSG that causes an empty string to trigger a negative string length copy. NOTE: this issue exists because of an incorrect fix for CVE-2007-2807.

Affected products

• Eggheads Eggdrop: version 1.6.0 only; version 1.6.1 only; version 1.6.2 only; version 1.6.3 only; version 1.6.4 only; version 1.6.5 only; …
• Eggheads Eggdrop Irc Bot: up to and including 1.6.19
• Philip Moore Windrop: up to and including 1.6.19; version 1.4.4 only; version 1.4.6 only; version 1.5.4 only; version 1.5.4a only; version 1.6.0 only; …

Published 2009-05-26. Last modified 2026-06-16.