TippingPoint Zero Day Initiative
 

RealNetworks Helix Server rn5auth Credential Parsing Remote Code Execution Vulnerability

ZDI-12-094: June 21st, 2012

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 12401. For further product information on the TippingPoint IPS:

Vulnerability Details


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

The specific flaw exists within rn4auth.dll, which is responsible for parsing authentication credentials. When the GetNameValuePair() function calls strcpy, there is an unbounded copy into a stack buffer, which can lead to stack memory corruption. An attacker can leverage this vulnerability to execute code under the context of the process.

Vendor Response

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

Disclosure Timeline

    2011-11-04 - Vulnerability reported to vendor
    2012-06-21 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Anonymous