CA Multiple Product DBASVR RPC Server Multiple Buffer Overflow Vulnerabilities
8 Oct. 2006
Summary
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Computer Associates BrightStor ARCserve Backup, Enterprise Backup, Server Protection Suite and Business Protection Suite. Authentication is not required to exploit this vulnerability and both client and servers are affected.
The problem specifically exists within DBASVR.exe, the Backup Agent RPC Server. This service exposes a number of vulnerable RPC routines through a TCP endpoint with ID 88435ee0-861a-11ce-b86b-00001b27f656 on port 6071. The most trivial of the exposed vulnerabilities results in an exploitable stack overflow.
long sub_4041C0 (
[in][string] char * arg_1,
[in][string] char * arg_2, // stack overflow
[out] long * arg_3
);
The first two vulnerable subroutines are the result of inline strcpy()/memcpy()'s. The third vulnerable subroutine is due to an insecure call to lstrcat().
Disclosure Timeline:
2006.03.27 - Digital Vaccine released to TippingPoint customers
2006.03.28 - Vulnerability reported to vendor
2006.10.05 - Coordinated public release of advisory
