TippingPoint Zero Day Initiative

FlexNet License Server Manager lmgrd Remote Code Execution Vulnerability

ZDI-12-052: March 26th, 2012

CVSS Score

Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of FlexNet License Server Manager. Authentication is not required to exploit this vulnerability.

The specific flaw exists within lmgrd license server manager. lmgrd listens by default on TCP port 27000. A specially crafted packet sent to the server will cause a stack overflow allowing for remote code execution under the context of the server.

Vendor Response

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

Disclosure Timeline

    2011-05-12 - Vulnerability reported to vendor
    2012-03-26 - Coordinated public release of advisory


This vulnerability was discovered by:
    Luigi Auriemma
    Alexander Gavrun