HTTP: Microsoft Internet Explorer 6-11 Use-After-Free

This signature detects attempts to exploit a known vulnerability against Microsoft Internet Explorer. A successful attack can lead to arbitrary code execution.

Extended Description

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the CMarkup::IsConnectedToPrimaryMarkup function, as exploited in the wild in April 2014. NOTE: this issue originally emphasized VGX.DLL, but Microsoft clarified that "VGX.DLL does not contain the vulnerable code leveraged in this exploit. Disabling VGX.DLL is an exploit-specific workaround that provides an immediate, effective workaround to help block known attacks."

References

BugTraq: 67075

CVE: CVE-2014-1776

URL: http://securitytracker.com/id?1030154 http://technet.microsoft.com/security/bulletin/ms14-021 http://technet.microsoft.com/en-us/library/security/2963983

Short Name

HTTP:STC:IE:6-11-UAF

Severity

Major

Recommended

False

Recommended Action

Drop

HTTP: Microsoft Internet Explorer 6-11 Use-After-Free

Extended Description

References

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