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             AUSCERT External Security Bulletin Redistribution

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


        AusCERT Security Bulletin Summary

Product:                Borland Interbase
Publisher:              iDEFENSE
Operating System:       Linux
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
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


Copyright (c) 2004 iDEFENSE, Inc.

Permission is granted for the redistribution of this alert
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at the time of publishing based on currently available information. Use
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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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