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    CVE-2006-6811

    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.

    Published:Dec 29, 2006
    Last Modified:Apr 23, 2026
    EPS:Dec 29, 2006
    EPSS Score:0.05621
    CVSS Score:6.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Kde
    Product
    Ksirc

    Exploits

    http://www.securityfocus.com/bid/21790https://www.exploit-db.com/exploits/3023http://www.securityfocus.com/bid/21790https://www.exploit-db.com/exploits/3023https://www.exploit-db.com/exploits/3023

    Common Weakness Enumeration

    CWE-617 Reachable Assertion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
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    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High