TippingPoint Zero Day Initiative
 

Sybase Adaptive Server Backup and Monitor Server Translation Array Remote Code Execution Vulnerability

ZDI-11-245: July 29th, 2011

CVSS Score

Affected Vendors

    Sybase

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11463. For further product information on the TippingPoint IPS:

Vulnerability Details

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

The specific flaw exists within the way Sybase Backup and Monitor servers handle certain data in the login packets. Malformed packets can cause the service in question to lookup a function pointer outside a predefined function pointer array. It is possible to set this function pointer to an address where user controlled data exists and this will result in code execution under the rights of the user running the Monitor Server.

Vendor Response

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

Disclosure Timeline

    2011-01-21 - Vulnerability reported to vendor
    2011-07-29 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Luigi Auriemma