TippingPoint Zero Day Initiative

Symantec Endpoint Protection SemSvc.exe AgentServlet Remote Code Execution Vulnerability

ZDI-12-145: August 22nd, 2012


CVSS Score

Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Symantec Endpoint Protection. Authentication is not required to exploit this vulnerability.

The specific flaw exists within SemSvc.exe which listens by default on TCP port 8443 (https). The SemSvc service exposes a servlet called 'AgentServlet" which allows remote users to activate certain tasks without prior authentication. In doing so, it is vulnerable to directory traversal attacks and arbitrary file deletion. When certain files are deleted, the eval() method will allow for executing user supplied commands. An attacker can leverage these vulnerabilities to execute code under the context of the SYSTEM.

Vendor Response

Symantec has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2011-10-28 - Vulnerability reported to vendor
    2012-08-22 - Coordinated public release of advisory


This vulnerability was discovered by:
    Andrea Micalizzi aka rgod