Integer underflow in the Lists_MakeMask() function in lists.c in ngIRCd before 0.8.2 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a long MODE line that causes an incorrect length calculation, which leads to a buffer overflow.

References

• https://nvd.nist.gov/vuln/detail/CVE-2005-0199
• https://exchange.xforce.ibmcloud.com/vulnerabilities/19143
• http://arthur.ath.cx/pipermail/ngircd-ml/2005-January/000228.html
• http://bugs.gentoo.org/show_bug.cgi?id=79705
• http://secunia.com/advisories/14056
• http://secunia.com/advisories/14059
• http://securitytracker.com/id?1013047
• http://www.gentoo.org/security/en/glsa/glsa-200501-40.xml
• http://www.securityfocus.com/bid/12397