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Details |
| Vulnerability name/brief description |
MS11-028 - Vulnerability in .NET Framework Could Allow Remote Code Execution (2484015)
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| CVE/CAN name |
CVE-2010-3958
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| Vendor threat level |
Critical
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| SophosLabs threat level |
Medium
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| Solution |
MS11-028
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| Vendor description |
This security update resolves a publicly disclosed vulnerability in Microsoft .NET Framework. The vulnerability could allow remote code execution on a client system if a user views a specially crafted Web page using a Web browser that can run XAML Browser Applications (XBAPs). 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. The vulnerability could also allow remote code execution on a server system running IIS, if that server allows processing ASP.NET pages and an attacker succeeds in uploading a specially crafted ASP.NET page to that server and then executes the page, as could be the case in a Web hosting scenario. This vulnerability could also be used by Windows .NET applications to bypass Code Access Security (CAS) restrictions.
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| SophosLabs comments |
The user may mitigate the effects of this vulnerability by disabling partially trusted .NET applications and disabling XAML browser applications in Internet Explorer.
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| SophosLabs testing result |
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| Currently known exploits |
At the time of writing SophosLabs has seen no samples of malware attempting to exploit this vulnerability. Should this situation change samples will be analysed and we will take action as necessary.
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| First sample seen |
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| Discovery date |
2011-04-12
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| Affected software |
Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 3.5 Service Pack 1
Microsoft .NET Framework 3.5.1 Service Pack 1
Microsoft .NET Framework 4.0
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| References |
http://www.microsoft.com/technet/security/bulletin/ms11-028.mspx
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3958
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| Credits |
MAPP
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| Revisions |
April 12, 2011 - Initial analysis written
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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.