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MSN Heartbeat Control Buffer Overflow (MS04-038)
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SUMMARY
A vulnerability has been discovered in the MSN Heartbeat ActiveX component
which can allow remote code execution through Internet Explorer. This
component is installed by some MSN gaming sites and is marked safe for
scripting by default.
DETAILS
When initializing the Heartbeat control in a web page, there are several
parameters which must be set to access the functionality within the
control, such as URLs and filenames. When providing an overly string for
the SetupData parameter, a heap based buffer overflow occurs. A reliable
arbitrary dword overwrite is possible, and it is trivial to exploit this
flaw.
Vendor Status:
Microsoft have released an update for the MSN Heartbeat component which
addresses this issue. See: h
<http://www.microsoft.com/technet/security/bulletin/MS04-038.mspx>
Cumulative Security Update for Internet Explorer (834707)
ADDITIONAL INFORMATION
The information has been provided by <mailto:nisr@nextgenss.com>
NGSSoftware Insight Security Research.
The original article can be found at:
<http://www.ngssoftware.com/advisories/heartbeatfull.txt>
http://www.ngssoftware.com/advisories/heartbeatfull.txt
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