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AUSCERT External Security Bulletin Redistribution
ESB-2005.0142 -- iDEFENSE Security Advisory 02.10.05
Computer Associates BrightStor ARCserve Backup
UniversalAgent Backdoor Vulnerability
11 February 2005
AusCERT Security Bulletin Summary
Product: BrightStor ARCserve Backup r11.1
Operating System: Linux variants
Impact: Execute Arbitrary Code/Commands
Original Bulletin: http://www.idefense.com/application/poi/display?id=198
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Computer Associates BrightStor ARCserve Backup UniversalAgent Backdoor
iDEFENSE Security Advisory 02.10.05
February 10, 2005
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 execution of arbitrary code.
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 full access to the
remote file system and potentially execute arbitrary commands with
permissions of the root user.
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.
VI. VENDOR RESPONSE
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 HPUX
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
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
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.
Get paid for vulnerability research
X. LEGAL NOTICES
Copyright (c) 2005 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically,
please email email@example.com for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS
condition. There are no warranties with regard to this information.
Neither the author nor the publisher accepts any liability for any
direct, indirect, or consequential loss or damage arising from use of,
or reliance on, this information.
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