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UNIRAS Brief - 134/04 - Borland Interbase admin.ib Administrative Access Vulnerability


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   UNIRAS (UK Govt CERT) Briefing Notice - 134/04 dated 23.03.04  Time: 11:30 
  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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Borland Interbase admin.ib Administrative Access Vulnerability


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.

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


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/.


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


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.


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.


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


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


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


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

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


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.

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UNIRAS wishes to acknowledge the contributions of iDEFENSE for the information 
contained in this Briefing. 
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<End of UNIRAS Briefing>

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