Advisory Details

July 29th, 2011

Sybase Adaptive Server Backup and Monitor Server NULL Write Remote Code Execution Vulnerability

ZDI-11-246
ZDI-CAN-1069

CVE ID
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Sybase
AFFECTED PRODUCTS Adaptive Server
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11463. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

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

The specific flaw exists within the way Sybase Backup and Monitor servers handles certain data in the login packets. Malformed packets can cause the service in question to write a NULL byte on the stack which can be leveraged by a remote attacker to execute code under the context of the running service.

ADDITIONAL DETAILS Sybase has issued an update to correct this vulnerability. More details can be found at:
http://www.sybase.com/detail?id=1094235
DISCLOSURE TIMELINE
  • 2011-02-02 - Vulnerability reported to vendor
  • 2011-07-29 - Coordinated public release of advisory
CREDIT Luigi Auriemma
BACK TO ADVISORIES