[NT] CA Multiple Product Message Engine RPC Server Code Execution Vulnerability

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CA Multiple Product Message Engine RPC Server Code Execution Vulnerability
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SUMMARY

LSsec has discovered a vulnerability in Computer Associates BrightStor
ARCserve Backup, which could be exploited by an anonymous attacker in
order to execute arbitrary code with SYSTEM privileges on an affected
system. The flaw specifically exists within the Discovery Service
(casdscsvc.exe) due to incorrect handling of requests on TCP port 41523.

DETAILS

Vulnerable Systems:
* BrightStor ARCserve Backup version R11.5 Server
* BrightStor Enterprise Backup version 10.5
* BrightStor ARCserve Backup version 9.01
* CA Server Protection Suite r2
* CA Business Protection Suite r2

The BrightStor software will automatically detect other BrightStor
(ARCserve) servers on the local network. The Discovery Service sends a
packet to the broadcast address of a given subnet. Each system running the
Discovery Service responds to the IP address embedded in the broadcast
packet. All systems discovered on the subnet transmit their hostnames and
IP addresses and then read in the hostname of the system which initiated
the broadcast. This hostname is copied into a fixed 1024 byte stack buffer
by use of an incongruous call to vsprintf() in ASBRDCST.DLL.

Vendor Response:
Computer Associates has issued an update to correct this vulnerability.
More details can be found at:
<http://supportconnectw.ca.com/public/storage/infodocs/basbr-secnotice.asp> http://supportconnectw.ca.com/public/storage/infodocs/basbr-secnotice.asp

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5143>
CVE-2006-5143

Disclosure Timeline:
2006.04.07 - Vulnerability reported to vendor
2006.04.11 - Digital Vaccine released to TippingPoint customers
2006.10.05 - Coordinated public release of advisory


ADDITIONAL INFORMATION

The information has been provided by <mailto:zdi-disclosures@xxxxxxxx>
The Zero Day Initiative (ZDI).
The original article can be found at:
<http://www.zerodayinitiative.com/advisories/ZDI-06-031.html>
http://www.zerodayinitiative.com/advisories/ZDI-06-031.html



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