HOMEVULNERABILITIESCVE-2009-1789
MEDIUMPOC

CVE-2009-1789

NVD-CWE-OtherPublished: May 26, 2009· Updated: Jun 16, 2026

4.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2009-1789 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2009-1789. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected Vendors & Products

eggheads2 product(s)
eggdropeggdrop irc bot
philip_moore1 product(s)
windrop
Source: NVD CPE · 42 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://cvs.eggheads.org/viewvc/viewvc.cgi/eggdrop1.6/doc/Changes1.6?revision=1.20&view=markup
PATCHhttp://www.vupen.com/english/advisories/2009/1340
PATCHhttp://cvs.eggheads.org/viewvc/viewvc.cgi/eggdrop1.6/doc/Changes1.6?revision=1.20&view=markup
PATCHhttp://www.vupen.com/english/advisories/2009/1340
ADVISORYhttp://secunia.com/advisories/35104
ADVISORYhttp://secunia.com/advisories/35104

All References (32)

→
http://archives.neohapsis.com/archives/fulldisclosure/2009-05/0129.html
→
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=528778
→
http://cvs.eggheads.org/viewvc/viewvc.cgi/eggdrop1.6/doc/Changes1.6?revision=1.20&view=markupPatch · Vendor Advisory
→
http://osvdb.org/54460
→
http://secunia.com/advisories/35104Vendor Advisory
→
http://secunia.com/advisories/35158
→
http://secunia.com/advisories/35690
→
http://www.debian.org/security/2009/dsa-1826
→
http://www.mandriva.com/security/advisories?name=MDVSA-2009:126
→
http://www.securityfocus.com/archive/1/503574
→
http://www.securityfocus.com/bid/34985
→
http://www.vupen.com/english/advisories/2009/1340Patch · Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/50547
→
https://www.exploit-db.com/exploits/8695
→
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01333.html

Quick Facts

CVE IDCVE-2009-1789
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
ExploitPOC
Affected2 vendor(s)
PublishedMay 26, 2009

Related CVEs (NVD-CWE-Other)

CVE-2014-1537
10.0
CVE-2014-1538
10.0
CVE-2013-6774
10.0
CVE-2014-1536
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CVE-2014-2867
10.0
CVE-2014-1541
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-1789 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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