MS13-080 - Cumulative Security Update for Internet Explorer (2879017)

Click any highlighted term for further explanation. For more information, contact technical support.


Vulnerability name/brief description MS13-080 - Cumulative Security Update for Internet Explorer (2879017)
CVE/CAN name
Vendor threat level Critical
SophosLabs threat level Critical
Solution MS13-080
Vendor description This security update resolves one publicly disclosed vulnerability and nine privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited the most severe of these vulnerabilities could gain the same user rights as the current user. 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 These vulnerabilities can be mitigated by configuring Internet Explorer to deactivate (or prompt for permission to run) ActiveX Controls and Active Scripting. This will, however, affect how web content is rendered.
SophosLabs testing result A widely available exploit for the publicly disclosed vulnerability (CVE-2013-3893) has been tested by Sophos on Windows 7 and reliably triggers a drive-by install. So there is a known public danger fixed by this patch.
Currently known exploits
First sample seen 2013-09-20
Discovery date 20 Sep 2013
Affected software Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Internet Explorer 9
Internet Explorer 10
Internet Explorer 11
  • MAPP
  • October 8, 2013 - Initial Revision Written
  • September 20, 2013 - Detection added

Explanation of terms

Vulnerability Name/Brief Description:

Vendor identifier plus a brief description of the type of attack.


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.


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.