TippingPoint Zero Day Initiative

CA BrightStor ARCserve Backup XDR Parsing Buffer Overflow Vulnerability

ZDI-08-026: May 19th, 2008


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4931. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allws attackers to execute arbitrary code on vulnerable installations of CA BrightStor ARCserve Backup for Linux. User interaction is not required to exploit this vulnerability.

The specific flaw exists due to improper bounds checking in the xdr_rwsstring() library function. By sending a long parameter into a daemon using this function to process strings, a stack based buffer overflow occurs, leading to execution of arbitrary code.

Vendor Response

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

Disclosure Timeline

    2006-09-12 - Vulnerability reported to vendor
    2008-05-19 - Coordinated public release of advisory


This vulnerability was discovered by:
    Damian Put