Stack-based buffer overflow in the PCHealth system in the Help and Support Center function in Windows XP and Windows Server 2003 allows remote attackers to execute arbitrary code via a long query in an HCP URL.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4706
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3889
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3685
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A217
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-044
http://www.securityfocus.com/bid/8828
http://www.ngssoftware.com/advisories/ms-pchealth.txt
http://www.kb.cert.org/vuls/id/467036
http://www.cert.org/advisories/CA-2003-27.html