Public Vulnerability Reports

Computer Associates BrightStor ARCserve Backup UniversalAgent Backdoor



BrightStor ARCserve Backup r11.1 delivers leading backup and restore
protection for all classes of Windows, NetWare, Linux and UNIX servers,
as well as Windows, Mac OS X, Linux, UNIX, AS/400 and VMS client


Remote exploitation of a design flaw in Computer Associates
International Inc's BrightStor ARCserve Backup UniversalAgent for UNIX
may allow attackers to browse the file system.

The vulnerability specifically exists due to hard coded credentials
being left in the production release of the UniversalAgent for UNIX. An
attacker may use the following credentials to gain read access to the
remote file system:

Username: x02rootx03 
Password: x02<%j8U]`~+Rix03


The BrightStor software uses a network agent to perform backups on
nodes across the network. Typically, the agent service requires either
administrative credentials or a node-specific password and is capable
of backing up files and remotely executing commands. The agent will
listen on TCP and UDP ports 6051 by default and is installed on every
node that the BrightStor server is configured to backup.


Computer Associates BrightStor ARCserve Backup r11.1 for Linux and UNIX
have been confirmed vulnerable.


Employ firewalls, access control lists or other TCP/UDP restriction
mechanism to limit access to the backup port on affected systems and
services. The login credentials are sent in cleartext and may also be
used to detect connections from attackers.


The following vendor advisories are available for this issue:

BAB 7.0 Linux

BAB 9.0 Linux Japanese

BAB 9.0 Linux English

BEB 10.0 AIX


BEB 10.0 Solaris

BEB 10.5 Tru64

BEB 10.5 HP

BEB 10.5 AIX

BEB 10.5 Solaris

BAB 11.1 Macintosh

BAB 11.1 Mainframe Linux

BAB 11.1 Tru64

BAB 11.1 Linux

BAB 11.1 HP

BAB 11.1 AIX

BAB 11.1 - Solaris

BEB 10.0 Mainframe Linux


The Common Vulnerabilities and Exposures (CVE) project has assigned the
names CAN-2005-0349 to these issues. This is a candidate for inclusion
in the CVE list (, which standardizes names for
security problems.


12/02/2004   Initial vendor notification
12/02/2004   Initial vendor response
02/10/2005   Coordinated public disclosure


The discoverer of this vulnerability wishes to remain anonymous.

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Copyright © 2005 Verisign, Inc.

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at the time of publishing based on currently available information. Use
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