TITLE:
Microsoft Internet Explorer "createTextRange()" Code Execution

SECUNIA ADVISORY ID:
SA18680

VERIFY ADVISORY:
http://secunia.com/advisories/18680/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Microsoft Internet Explorer 6.x
http://secunia.com/product/11/

DESCRIPTION:
Secunia Research has discovered a vulnerability in Microsoft Internet
Explorer, which can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to an error in the processing of the
"createTextRange()" method call applied on a radio button control.
This can be exploited by e.g. a malicious web site to corrupt memory
in a way, which allows the program flow to be redirected to the
heap.

Successful exploitation allows execution of arbitrary code.

The vulnerability has been confirmed on a fully patched system with
Internet Explorer 6.0 and Microsoft Windows XP SP2. The vulnerability
has also been confirmed in Internet Explorer 7 Beta 2 Preview. Other
versions may also be affected.

SOLUTION:
Do not visit untrusted web sites.

NOTE: The vendor is currently working on a patch.

PROVIDED AND/OR DISCOVERED BY:
Andreas Sandblad, Secunia Research.

Independently discovered and reported on public mailing lists by
Stelian Ene.

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