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Computer Associates BrightStor HSM Multiple Vulnerabilities
Computer Associates <http://www3.ca.com/solutions/Product.aspx?ID=5586>
BrightStor Hierarchical Storage Manager (HSM) is an application used to
create a tiered storage solution for enterprises that require on demand
access to large quantities of data. The HSM caches frequently used files
on hard drives for fast access, and stores seldom used files on tape.
Access to files stored on tape is transparent to the client applications.
The CsAgent process (CsAgent.exe) is a component of the HSM suite, and
listens on TCP port 2000.
Remote exploitation of multiple buffer overflow vulnerabilities in
Computer Associates International Inc.'s (CA) BrightStor HSM allows
attackers to execute arbitrary code with SYSTEM privileges.
* Computer Associates BrightStor HSM version r11.5.
These problems specifically exist within various command handlers in the
CsAgent service. There are eleven command handlers that contain one or
more stack based buffer overflow vulnerabilities each. All of these
vulnerabilities are simple sprintf() calls that overflow fixed size stack
buffers with attacker supplied data.
Additionally, there are five command handlers that are vulnerable to
integer overflow vulnerabilities. In addition to this, the function
responsible for reading in and dispatching a request to the appropriate
handler also contains an integer overflow vulnerability. In each case, a
32-bit integer is taken from the packet and either added or multiplied to
determine how much memory to allocate. When these calculations cause an
integer wrap, a heap buffer of insufficient size is allocated. Later, a
heap overflow occurs when filling the buffer.
Exploitation of these vulnerabilities results in the execution of
arbitrary code with SYSTEM privileges. Unsuccessful attempts will crash
the service, but it will be restarted by a watchdog process soon
In order to exploit this vulnerability, an attacker must be able to
establish a TCP session on port 2000 with the vulnerable host. No
authentication is required.
Computer Associates has addressed these vulnerabilities with the release
of version r11.6. For more information, consult CA's security notice at
the following URL.
* 04/13/2007 Initial vendor notification
* 04/13/2007 Initial vendor response
* 09/27/2007 Coordinated public disclosure
The information has been provided by iDefense.
The original article can be found at:
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