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UNIRAS Brief - 137/04 - iDEFENSE Security Advisory



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 137/04 dated 24.03.04  Time: 11:00  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
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Borland Interbase admin.ib Administrative Access Vulnerability


Detail
====== 

Exploitation of default file permissions in Borland Interbase can allow local
attackers to gain database administrative privileges.



           ESB-2004.0230 -- iDEFENSE Security Advisory 03.19.04
      Borland Interbase admin.ib Administrative Access Vulnerability
                               24 March 2004


Product:                Borland Interbase
Publisher:              iDEFENSE
Operating System:       Linux
                        Solaris
                        UNIX
                        Windows
Impact:                 Administrator Compromise
Access Required:        Existing Account

Comment: Note that this vulnerability allows escalation by existing users
         to database administrative privileges.

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Borland Interbase admin.ib Administrative Access Vulnerability

iDEFENSE Security Advisory 03.19.04 www.idefense.com/application/poi/display?id=80&type=vulnerabilities
March 19, 2004

I. BACKGROUND

Borland Interbase is a small, high performance commercial database for Linux, Solaris, and Windows operating systems. More information about Borland Interbase is available at http://www.borland.com/interbase/.

II. DESCRIPTION

Exploitation of default file permissions in Borland Interbase can allow local attackers to gain database administrative privileges.

The vulnerability specifically exists due to insecure permissions on the admin.ib user database file. Local attackers can add or modify existing accounts to gain administrative privileges.

The default file permissions are shown below:

    [root@labs interbase]# ls -l /opt/interbase/admin.ib

    -rw-rw-rw- 1 root root 616497 Dec 30 11:17 /opt/interbase/admin.ib

III. ANALYSIS

Successful exploitation yields administrative privileges over the database to local attackers. This can lead to further compromise as any information stored within the database is now available to the attacker. This may include: authentication information, financial information and personal information.

Exploit code for this issue is unnecessary.

IV. DETECTION

iDEFENSE has confirmed the existence of this vulnerability in Borland Interbase 7.1 for Linux. It is suspected that previous versions of Borland Interbase for Linux are also vulnerable.

V. WORKAROUNDS

Remove global write permissions from the admin.ib user database file.

    [root@labs interbase]# chmod 664 /opt/interbase/admin.ib

    [root@labs interbase]# ls -l /opt/interbase/admin.ib

    -rw-rw-r-- 1 root root 616497 Dec 30 11:17 /opt/interbase/admin.ib

VI. CVE INFORMATION

A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet.

VII. DISCLOSURE TIMELINE

January 13, 2004    Vulnerability acquired by iDEFENSE 
February 9, 2004    Initial vendor notification sent - no response
February 12, 2004   iDEFENSE clients notified
March 1, 2004       Secondary vendor notification sent - no response
March 19, 2004      Public disclosure

VIII. CREDIT

Larry Cashdollar (http://vapid.dhs.org) is credited with this discovery.

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

IX. LEGAL NOTICES

Copyright (c) 2004 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@xxxxxxxxxxxx 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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For additional information or assistance, please contact the HELP Desk by 
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Tel: +44 (0) 20 7821 1330 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of iDEFENSE for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

Reference to any specific commercial product, process, or service by trade 
name, trademark manufacturer, or otherwise, does not constitute or imply 
its endorsement, recommendation, or favouring by UNIRAS or NISCC.  The views 
and opinions of authors expressed within this notice shall not be used for 
advertising or product endorsement purposes.

Neither UNIRAS or NISCC shall also accept responsibility for any errors 
or omissions contained within this briefing notice. In particular, they shall 
not be liable for any loss or damage whatsoever, arising from or in connection 
with the usage of information contained within this notice.

UNIRAS is a member of the Forum of Incident Response and Security Teams (FIRST) 
and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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