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Extremely critical

Microsoft Internet Explorer Multiple Vulnerabilities

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Release Date:  2010-01-15    Last Update:  2010-02-16    Views:  39,002

Secunia Advisory SA38209

Where:

From remote

Impact:

Cross Site Scripting, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in Microsoft Internet Explorer, which can be exploited by malicious people to conduct cross-site scripting attacks or compromise a user's system.

1) A use-after-free error during event handling when the object firing the event is removed from the markup can be exploited to corrupt memory.

NOTE: This vulnerability is currently being actively exploited.

2) An error in the Internet Explorer 8 XSS filter may cause an HTML attribute to be incorrectly disabled in otherwise properly filtered HTTP response data. This can be exploited to bypass the filter and execute arbitrary HTML and script code in the wrong security context.

3) An error when validating input parameters in URLs may result in execution of a program on the local system.

4) An error exists in the handling of "Col" elements used within an HTML table container, which may result in memory corruption.

5) A use-after-free error exists in the handling of elements that manipulate the font baseline (e.g. "sub" or "sup") when rendering intertwined "strike" and "center" tags.

6) A use-after-free error exists in the handling elements used within a table container.

7) An error in the "mergeAttributes()" method when accessing an object that has not been initialised or has been deleted may result in memory corruption.

8) A use-after-free error in the handling of cloned DOM objects in Javascript can be exploited via a specially crafted sequence of object cloning.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Reported as a 0-day.
The vendor also credits Meron Sellem, BugSec.
2) The vendor credits David Lindsay "thornmaker" and Eduardo A. Vela Nava "sirdarckcat".
3) Lostmon Lords.
Brett Moore of Insomnia Security, reported via ZDI.
4) wushi, team509 via Zero Day Initiative.
5, 6) Sam Thomas, eshu.co.uk via Zero Day Initiative.
7) Haifei Li, Fortinet's FortiGuard Labs.
8) Peter Vreugdenhil, Verisign iDefense Labs via Zero Day Initiative.

Original Advisory:
Microsoft (KB979352):
http://www.microsoft.com/technet/security/advisory/979352.mspx
http://blogs.technet.com/msrc/archive/2010/01/14/security-advisory-979352.aspx

MS10-002 (KB978207):
http://www.microsoft.com/technet/security/Bulletin/MS10-002.mspx

ZDI:
http://www.zerodayinitiative.com/advisories/ZDI-10-011/
http://www.zerodayinitiative.com/advisories/ZDI-10-012/
http://www.zerodayinitiative.com/advisories/ZDI-10-013/
http://www.zerodayinitiative.com/advisories/ZDI-10-014/

Lostmon Lords:
http://lostmon.blogspot.com/2010/01/internet-explorer-6-7-8-url-validation.html
http://lostmon.blogspot.com/2010/02/internet-explorer-7-8-url-validation.html

Fortinet:
http://www.fortiguard.com/advisory/FGA-2010-05.html

Insomnia Security:
http://www.insomniasec.com/advisories/ISVA-100216.1.htm

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Internet Explorer Multiple Vulnerabilities

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