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

July 29th, 2011
ZDI-11-245 ZDI-CAN-1077

CVE ID

CVSS Score

10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected Vendors

Sybase

Affected Products

Adaptive Server

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.

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

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

Credit

Luigi Auriemma

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