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Secunia Research 23/03/2006
- Microsoft Internet Explorer "createTextRange()" Code Execution -
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Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9
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1) Affected Software
* Microsoft Internet Explorer 6
* Microsoft Internet Explorer 7 Beta 2 Preview (January edition)
Other versions may also be affected.
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2) Severity
Rating: Highly critical
Impact: System access
Where: Remote
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3) Description of Vulnerability
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.
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4) Solution
Disable Active Scripting support.
NOTE: The vendor is currently working on a patch.
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5) Time Table
10/02/2006 - Vulnerability discovered.
13/02/2006 - Vendor notified.
21/02/2006 - Vendor confirms vulnerability.
22/03/2006 - Vulnerability reported to public mailing lists by
third-party.
23/03/2006 - Public disclosure.
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6) Credits
Discovered by Andreas Sandblad, Secunia Research.
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7) References
US-CERT VU#876678:
http://www.kb.cert.org/vuls/id/876678
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
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9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2006-7/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
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