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Vulnerability: MS09-002. Critical Cumulative Security Update for Internet Explorer (961260)

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Details
Vulnerability name/brief description Critical Cumulative Security Update for Internet Explorer (961260) - MS09-002
CVE/CAN name

CVE-2009-0075, CVE-2009-0076

Vendor threat level Critical
SophosLabs threat level High
Solution

Users are advised to apply the vendor patch for MS09-002 .

Vendor description

This security update resolves two privately reported vulnerabilities. The vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

SophosLabs comments

The patched vulnerabilities may result in remote code execution. They can be exploited by enticing the user to open specially crafted Web pages. The vulnerability has been assigned a high threat level.

SophosLabs testing result N/A
Currently known exploits Mal/JsShell-B - CVE-2009-0075
Mal/ExpJS-I - CVE-2009-0075
First sample seen 17 February 2009
Discovery date 10 February 2009
Affected software

Internet Explorer 7

References

http://www.microsoft.com/technet/security/bulletin/ms09-002.mspx
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0075
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0076

Credits

Microsoft MAPP program

Revisions

17 February 2009 - added details of exploit discovered sample

10 February 2009 - initial analysis written

Explanation of terms

Vulnerability Name/Brief Description:
Vendor identifier plus a brief description of the type of attack.

CVE/CAN Name:
Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.

Vendor Threat Level:

Threat level assigned by the vendor

SophosLabs Threat Level:
Threat level assigned by SophosLabs

  • LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
  • MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
  • HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
  • CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.

Solution:
Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.

Vendor Description:
Summary of the cause and potential effect of the vulnerability provided by the vendor.

SophosLabs Comments:
SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:
Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.

Currently Known Exploits:
List of identities for known exploits, if applicable.

First Sample Seen:
Date of the first sample seen by SophosLabs.

Discovery Date:
Date of the earliest known publically disclosed advisory.

Affected Software:
Vulnerable platforms and software versions.

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