CVE-2009-1789

Exp

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.

Published: 2009-05-26 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-1789 is rated High Exploit Risk (60.2/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.49%, 94th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-1789

EDB-ID Source Kind Published Link
8695 exploit_db edb 2009-05-15 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-1789

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 14.22% 8.49% -5.73%
2 2025-03-30 24.06% 14.22% -9.84%
3 2025-03-29 — 24.06% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-1789

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2009-1789

OS Trackers for CVE-2009-1789

vendor priority summary link
debian medium CVE-2009-1789 medium priority: Debian including 1 source packages (eggdrop), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-1789
redhat high — https://access.redhat.com/security/cve/CVE-2009-1789
ubuntu low CVE-2009-1789 low priority: Ubuntu including 1 source packages (eggdrop), 7 status rows across 7 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, upstream): released 6, ignored 1. https://ubuntu.com/security/CVE-2009-1789

Affected software / configurations for CVE-2009-1789

Vendor Product Version Raw CPE
eggheads eggdrop 1.6.0 cpe:2.3:a:eggheads:eggdrop:1.6.0:*:*:*:*:*:*:*
eggheads eggdrop 1.6.1 cpe:2.3:a:eggheads:eggdrop:1.6.1:*:*:*:*:*:*:*
eggheads eggdrop 1.6.2 cpe:2.3:a:eggheads:eggdrop:1.6.2:*:*:*:*:*:*:*
eggheads eggdrop 1.6.3 cpe:2.3:a:eggheads:eggdrop:1.6.3:*:*:*:*:*:*:*
eggheads eggdrop 1.6.4 cpe:2.3:a:eggheads:eggdrop:1.6.4:*:*:*:*:*:*:*
eggheads eggdrop 1.6.5 cpe:2.3:a:eggheads:eggdrop:1.6.5:*:*:*:*:*:*:*
eggheads eggdrop 1.6.6 cpe:2.3:a:eggheads:eggdrop:1.6.6:*:*:*:*:*:*:*
eggheads eggdrop 1.6.7 cpe:2.3:a:eggheads:eggdrop:1.6.7:*:*:*:*:*:*:*
eggheads eggdrop 1.6.8 cpe:2.3:a:eggheads:eggdrop:1.6.8:*:*:*:*:*:*:*
eggheads eggdrop 1.6.9 cpe:2.3:a:eggheads:eggdrop:1.6.9:*:*:*:*:*:*:*
eggheads eggdrop 1.6.10 cpe:2.3:a:eggheads:eggdrop:1.6.10:*:*:*:*:*:*:*
eggheads eggdrop 1.6.11 cpe:2.3:a:eggheads:eggdrop:1.6.11:*:*:*:*:*:*:*
eggheads eggdrop 1.6.12 cpe:2.3:a:eggheads:eggdrop:1.6.12:*:*:*:*:*:*:*
eggheads eggdrop 1.6.13 cpe:2.3:a:eggheads:eggdrop:1.6.13:*:*:*:*:*:*:*
eggheads eggdrop 1.6.14 cpe:2.3:a:eggheads:eggdrop:1.6.14:*:*:*:*:*:*:*
eggheads eggdrop 1.6.15 cpe:2.3:a:eggheads:eggdrop:1.6.15:*:*:*:*:*:*:*
eggheads eggdrop 1.6.16 cpe:2.3:a:eggheads:eggdrop:1.6.16:*:*:*:*:*:*:*
eggheads eggdrop 1.6.17 cpe:2.3:a:eggheads:eggdrop:1.6.17:*:*:*:*:*:*:*
eggheads eggdrop 1.6.18 cpe:2.3:a:eggheads:eggdrop:1.6.18:*:*:*:*:*:*:*
eggheads eggdrop 1.6.18 cpe:2.3:a:eggheads:eggdrop:1.6.18:rc1:*:*:*:*:*:*
eggheads eggdrop_irc_bot <= 1.6.19 cpe:2.3:a:eggheads:eggdrop_irc_bot:*:*:*:*:*:*:*:*
philip_moore windrop <= 1.6.19 cpe:2.3:a:philip_moore:windrop:*:*:*:*:*:*:*:*
philip_moore windrop 1.4.4 cpe:2.3:a:philip_moore:windrop:1.4.4:*:final:*:*:*:*:*
philip_moore windrop 1.4.6 cpe:2.3:a:philip_moore:windrop:1.4.6:*:*:*:*:*:*:*
philip_moore windrop 1.5.4 cpe:2.3:a:philip_moore:windrop:1.5.4:*:final:*:*:*:*:*
philip_moore windrop 1.5.4 cpe:2.3:a:philip_moore:windrop:1.5.4:rc1:*:*:*:*:*:*
philip_moore windrop 1.5.4 cpe:2.3:a:philip_moore:windrop:1.5.4:rc2:*:*:*:*:*:*
philip_moore windrop 1.5.4a cpe:2.3:a:philip_moore:windrop:1.5.4a:*:*:*:*:*:*:*
philip_moore windrop 1.6.0 cpe:2.3:a:philip_moore:windrop:1.6.0:*:final:*:*:*:*:*
philip_moore windrop 1.6.0 cpe:2.3:a:philip_moore:windrop:1.6.0:rc1:*:*:*:*:*:*
philip_moore windrop 1.6.0 cpe:2.3:a:philip_moore:windrop:1.6.0:rc1-rel2:*:*:*:*:*:*
philip_moore windrop 1.6.1 cpe:2.3:a:philip_moore:windrop:1.6.1:*:*:*:*:*:*:*
philip_moore windrop 1.6.2\+bindsfix cpe:2.3:a:philip_moore:windrop:1.6.2\+bindsfix:*:*:*:*:*:*:*
philip_moore windrop 1.6.3 cpe:2.3:a:philip_moore:windrop:1.6.3:*:*:*:*:*:*:*
philip_moore windrop 1.6.4 cpe:2.3:a:philip_moore:windrop:1.6.4:sr1:*:*:*:*:*:*
philip_moore windrop 1.6.6 cpe:2.3:a:philip_moore:windrop:1.6.6:*:*:*:*:*:*:*
philip_moore windrop 1.6.7 cpe:2.3:a:philip_moore:windrop:1.6.7:*:*:*:*:*:*:*
philip_moore windrop 1.6.8 cpe:2.3:a:philip_moore:windrop:1.6.8:*:*:*:*:*:*:*
philip_moore windrop 1.6.9 cpe:2.3:a:philip_moore:windrop:1.6.9:*:*:*:*:*:*:*
philip_moore windrop 1.6.10 cpe:2.3:a:philip_moore:windrop:1.6.10:*:*:*:*:*:*:*
philip_moore windrop 1.6.12 cpe:2.3:a:philip_moore:windrop:1.6.12:*:*:*:*:*:*:*
philip_moore windrop 1.6.13 cpe:2.3:a:philip_moore:windrop:1.6.13:*:*:*:*:*:*:*
philip_moore windrop 1.6.15 cpe:2.3:a:philip_moore:windrop:1.6.15:*:*:*:*:*:*:*
philip_moore windrop 1.6.16 cpe:2.3:a:philip_moore:windrop:1.6.16:*:*:*:*:*:*:*
philip_moore windrop 1.6.17 cpe:2.3:a:philip_moore:windrop:1.6.17:*:*:*:*:*:*:*
philip_moore windrop 1.6.18 cpe:2.3:a:philip_moore:windrop:1.6.18:*:*:*:*:*:*:*
philip_moore windrop 1.6.19\+ctcpfix cpe:2.3:a:philip_moore:windrop:1.6.19\+ctcpfix:*:*:*:*:*:*:*

References for CVE-2009-1789

URL Tags
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=markup Patch Vendor Advisory
http://osvdb.org/54460
http://secunia.com/advisories/35104 Vendor 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/2009/1340 Patch 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
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01337.html
cvelogic Threat Intelligence