TippingPoint Digital Vaccine Laboratories
DID YOU KNOW... In December of 2007, Microsoft released seven security bulletins which fixed 11 new security vulnerabilities. TippingPoint and ZDI were credited with discovering a total of four of those vulnerabilities.

Microsoft Windows Workstation Service NetrGetJoinInformation Heap Corruption Vulnerability

TPTI-09-06: August 11th, 2009


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8386. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. Valid user credentials are required to exploit this vulnerability.

The specific flaw exists in the Workstation RPC Service. When handling the arguments for the NetrGetJoinInformation function, memory is improperly freed and can lead to remote code execution. Successful exploitation can lead to a remote system compromise under SYSTEM credentials.

Vendor Response

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

Disclosure Timeline

    2009-05-11 - Vulnerability reported to vendor
    2009-08-11 - Coordinated public release of advisory


This vulnerability was discovered by: