MS13-012 - Vulnerabilities in Microsoft Exchange Server Could Allow Remote Code

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Details
Vulnerability name/brief description MS13-012 - Vulnerabilities in Microsoft Exchange Server Could Allow Remote Code
CVE/CAN name
Vendor threat level Critical
SophosLabs threat level High
Solution MS13-012
Vendor description This security update resolves publicly disclosed vulnerabilities in Microsoft Exchange Server. The most severe vulnerability is in Microsoft Exchange Server WebReady Document Viewing, and could allow remote code execution in the security context of the transcoding service on the Exchange server if a user previews a specially crafted file using Outlook Web App (OWA). The transcoding service in Exchange that is used for WebReady Document Viewing is running in the LocalService account. The LocalService account has minimum privileges on the local computer and presents anonymous credentials on the network.
SophosLabs comments This vulnerability can be mitigated by disabling WebReady document view in Microsoft Exchange Server.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits No currently known exploits found
First sample seen No samples found
Discovery date 12 Feb 2013
Affected software Microsoft Exchange Server 2007 Service Pack 3
Microsoft Exchange Server 2010 Service Pack 2
References
Credits
  • MAPP
Revisions
  • February 12, 2013 - 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:

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Vendor Description:

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SophosLabs Comments:

SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:

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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.