Integer underflow in the CDownloadSink class code in the Vector Markup Language (VML) component (VGX.DLL), as used in Internet Explorer 5.01, 6, and 7 allows remote attackers to execute arbitrary code via compressed content with an invalid buffer size, which triggers a heap-based buffer overflow.

References

• https://nvd.nist.gov/vuln/detail/CVE-2007-1749
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-050
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1784
• http://research.eeye.com/html/advisories/published/AD20070814a.html
• http://secunia.com/advisories/26409
• http://securityreason.com/securityalert/3020
• http://www.kb.cert.org/vuls/id/468800
• http://www.securityfocus.com/archive/1/476498/100/0/threaded
• http://www.securityfocus.com/bid/25310
• http://www.securitytracker.com/id?1018568
• http://www.us-cert.gov/cas/techalerts/TA07-226A.html
• http://www.vupen.com/english/advisories/2007/2874