TippingPoint Zero Day Initiative

EMC Legato Networker Remote Exec Service Stack Overflow Vulnerabilities

ZDI-07-049: August 20th, 2007


Affected Vendors

Affected Products


TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 5259. For further product information on the TippingPoint IPS:

Vulnerability Details

These vulnerabilities allow remote attackers to execute arbitrary code on vulnerable installations of EMC Networker. Authentication is not required to exploit this vulnerability.

The specific flaws exist in the Networker Remote Exec Service, nsrexecd.exe. The location of this service is available by querying the SUNRPC portmapper on TCP port 111 for service #0x5f3e1, version 1. When supplying a long invalid subcmd to a poll or a kill request, an exploitable stack overflow vulnerability can occur within a call to sprintf().

Vendor Response

EMC states:

EMC has issued updates to correct this vulnerability. More details can be found in knowledge base article esg83899 available from powerlink.emc.com. EMC customers can further contact EMC Software Technical Support at 1-877-534-2867.

Disclosure Timeline

    2007-02-23 - Vulnerability reported to vendor
    2007-08-20 - Coordinated public release of advisory


This vulnerability was discovered by:
    Tenable Network Security