Internet Explorer 6.0 SP1 and earlier, and possibly other versions, allows remote attackers to cause a denial of service (application crash from "memory corruption") via certain malformed Cascading Style Sheet (CSS) elements that trigger heap-based buffer overflows, as demonstrated using the "<STYLE>@;/*" string, possibly due to a missing comment terminator that may cause an invalid length to trigger a large memory copy operation, aka the "CSS Heap Memory Corruption Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6579
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5592
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4169
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3372
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2906
https://exchange.xforce.ibmcloud.com/vulnerabilities/16675
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-038
http://www.us-cert.gov/cas/techalerts/TA04-293A.html
http://www.securiteam.com/exploits/5NP042KF5A.html
http://www.kb.cert.org/vuls/id/291304
http://www.ciac.org/ciac/bulletins/p-006.shtml
http://secunia.com/advisories/12806
http://marc.info/?l=full-disclosure&m=109102919426844&w=2