CVE-2009-1789

Eggdrop and Windrop < 1.6.19 - Denial of Service via PRIVMSG String Length Miscount

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-1789. PoCs published by Thomas Sader.

AI-analyzed exploit summary This is a writeup detailing a remote crash vulnerability in eggdrop/windrop versions 1.6.19 due to an improper fix for CVE-2007-2807. The vulnerability allows a remote attacker to crash the IRC bot by sending a malformed PRIVMSG.

Description

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.

Exploits (1)

exploitdb WRITEUP VERIFIED
by Thomas Sader · textdosmultiple
https://www.exploit-db.com/exploits/8695

This is a writeup detailing a remote crash vulnerability in eggdrop/windrop versions 1.6.19 due to an improper fix for CVE-2007-2807. The vulnerability allows a remote attacker to crash the IRC bot by sending a malformed PRIVMSG.

Classification
Writeup 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: eggdrop/windrop 1.6.19 (without ctcpfix patch)
No auth needed
Prerequisites: Access to the same IRC network as the target eggdrop/windrop bot
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (16)

Core 16
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/50547
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/35104
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/54460
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/503574
Patch, Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2009/1340
Vendor Advisory vendor-advisory x_refsource_fedora
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01337.html
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/8695
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/35690
Third Party Advisory mailing-list x_refsource_fulldisc
http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0129.html
Vendor Advisory vendor-advisory x_refsource_mandriva
http://www.mandriva.com/security/advisories?name=MDVSA-2009:126
Issue Tracking x_refsource_confirm
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528778
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/34985
Vendor Advisory vendor-advisory x_refsource_fedora
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01333.html
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/35158
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2009/dsa-1826

Scores

EPSS 0.1422
EPSS Percentile 94.5%

Details

Status published
Products (42)
eggheads/eggdrop 1.6.0
eggheads/eggdrop 1.6.1
eggheads/eggdrop 1.6.2
eggheads/eggdrop 1.6.3
eggheads/eggdrop 1.6.4
eggheads/eggdrop 1.6.5
eggheads/eggdrop 1.6.6
eggheads/eggdrop 1.6.7
eggheads/eggdrop 1.6.8
eggheads/eggdrop 1.6.9
... and 32 more
Published May 26, 2009
Tracked Since Feb 18, 2026