[Full-Disclosure] iDEFENSE Security Advisory 02.10.05: Computer Associates BrightStor ARCserve Backup UniversalAgent Backdoor Vulnerability

idlabs-advisories_at_idefense.com
Date: 02/10/05

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    Computer Associates BrightStor ARCserve Backup UniversalAgent Backdoor
    Vulnerability

    iDEFENSE Security Advisory 02.10.05
    www.idefense.com/application/poi/display?id=198&type=vulnerabilities
    February 10, 2005

    I. BACKGROUND

    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
    environments.

    II. DESCRIPTION

    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.

    Username: \x02root\x03
    Password: \x02<%j8U]`~+Ri\x03

    III. ANALYSIS

    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.

    IV. DETECTION

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

    V. WORKAROUND

    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
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63672

    BAB 9.0 Linux Japanese
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63673

    BAB 9.0 Linux English
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63674

    BEB 10.0 AIX
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63675

    BEB 10.0 HPUX
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63676

    BEB 10.0 Solaris
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63677

    BEB 10.5 Tru64
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63678

    BEB 10.5 HP
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63679

    BEB 10.5 AIX
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63680

    BEB 10.5 Solaris
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63681

    BAB 11.1 Macintosh
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63682

    BAB 11.1 Mainframe Linux
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63683

    BAB 11.1 Tru64
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63684

    BAB 11.1 Linux
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63685

    BAB 11.1 HP
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63691

    BAB 11.1 AIX
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63687

    BAB 11.1 - Solaris
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63688

    BEB 10.0 Mainframe Linux
    http://supportconnect.ca.com/sc/solcenter/solresults.jsp?aparno=QO63689

    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

    IX. CREDIT

    The discoverer of this vulnerability wishes to remain anonymous.

    Get paid for vulnerability research
    http://www.idefense.com/poi/teams/vcp.jsp

    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 customerservice@idefense.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.

    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

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