Vulnerability Note VU#279774

Computer Associates BrightStor ARCserve Backup Agents vulnerable to buffer overflow

The ARCserve Backup Agents fail to properly validate input, which creates a buffer overflow vulnerability. By default, the Backup Agents listen on 6070/tcp.

Exploit code for this vulnerability is publicly available.

II. Impact

Upgrade or install patches, as recommended by the Computer Associates vulnerability 33239 description.

Restrict Access

You may wish to block access to the vulnerable software from outside your network perimeter, specifically by blocking access to the ports used by the Backup Agents (typically 6070/tcp). This will limit your exposure to attacks. However, blocking at the network perimeter would still allow attackers within the perimeter of your network to exploit the vulnerability. The use of host-based firewalls in addition to network-based firewalls can help restrict access to specific hosts within the network. It is important to understand your network's configuration and service requirements before deciding what changes are appropriate.

Systems Affected

http://www3.ca.com/securityadvisor/vulninfo/vuln.aspx?id=33239
http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO70767&startsearch=1
http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO70769&startsearch=1
http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO70770&startsearch=1
http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO70774&startsearch=1
http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO70773&startsearch=1
http://idefense.com/application/poi/display?id=287
http://www.securitytracker.com/alerts/2005/Aug/1014611.html
http://secunia.com/advisories/16316/
http://osvdb.org/displayvuln.php?osvdb_id=18501
http://www.securityfocus.com/bid/14453

Credit

This vulnerability was reported by Computer Associates, who in turn thank iDEFENSE for reporting the vulnerability.

This document was written by Will Dormann.

Other Information

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