CVE-2006-6811

Name: CVE-2006-6811
Creator: NVD / NIST
Published: 2006-12-29T11:28:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 9.99%

Last modified Jun 16, 2026

CVE-2006-6811 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.. EPSS estimates a 9.99% chance of exploitation in the next 30 days.

Description

KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

9.99%

95.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Kde	Ksirc	1.3.12
Canonical	Ubuntu Linux	5.10
Canonical	Ubuntu Linux	6.06
Canonical	Ubuntu Linux	6.10

References

http://osvdb.org/33443Broken Link
http://security.gentoo.org/glsa/glsa-200701-26.xmlThird Party Advisory
http://securitytracker.com/id?1017453Broken Link, Third Party Advisory, VDB Entry
http://www.addict3d.org/index.php?page=viewarticle&trace=0&type=security&ID=8468Broken Link
http://www.kde.org/info/security/advisory-20070109-1.txtThird Party Advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2007:009Broken Link
http://www.securityfocus.com/archive/1/456379/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/21790Broken Link, Exploit, Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/usn-409-1Third Party Advisory
http://www.vupen.com/english/advisories/2006/5199Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/31134Third Party Advisory, VDB Entry
https://issues.rpath.com/browse/RPL-922Broken Link
https://www.exploit-db.com/exploits/3023Exploit, Third Party Advisory, VDB Entry
http://osvdb.org/33443Broken Link
http://security.gentoo.org/glsa/glsa-200701-26.xmlThird Party Advisory
http://securitytracker.com/id?1017453Broken Link, Third Party Advisory, VDB Entry
http://www.addict3d.org/index.php?page=viewarticle&trace=0&type=security&ID=8468Broken Link
http://www.kde.org/info/security/advisory-20070109-1.txtThird Party Advisory
http://www.mandriva.com/security/advisories?name=MDKSA-2007:009Broken Link
http://www.securityfocus.com/archive/1/456379/100/0/threadedBroken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/21790Broken Link, Exploit, Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/usn-409-1Third Party Advisory
http://www.vupen.com/english/advisories/2006/5199Broken Link
https://exchange.xforce.ibmcloud.com/vulnerabilities/31134Third Party Advisory, VDB Entry
https://issues.rpath.com/browse/RPL-922Broken Link
https://www.exploit-db.com/exploits/3023Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Dec 29, 2006
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2006-6811?

How severe is CVE-2006-6811?

CVE-2006-6811 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 9.99% probability of exploitation in the next 30 days.

How do I fix CVE-2006-6811?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2006-6811?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST