ZDI-11-153: Embarcadero Interbase connect Request Parsing Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-153

April 29, 2011

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:
Embarcadero

-- Affected Products:
Embarcadero Interbase

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 5626. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Borland Interbase. Authentication is not
required to exploit these vulnerabilities.

The specific flaws exists within the database service, ibserver.exe,
which binds to TCP port 3050. When a specially crafted "connect" (opcode
0x01) message is sent a stack-based buffer overflow can occur. If
properly exploited this can lead to remote compromise of the system with
SYSTEM credentials.

-- Vendor Response:

Embarcadero states:
This issue is now resolved in InterBase XE update 2. This update is
available from http://cc.embarcadero.com/reg/interbase. On that page,
there are multiple downloads which contain this fix. Below are the
descriptions of all the downloads that have this fix. Note that each
description has two downloads, one for English and one for Japanese.

InterBase XE 64-bit Update 2 (10.0.2.474) for Windows

InterBase XE Update 2 (10.0.2.467) for Linux

InterBase XE 32-bit Update 2 (10.0.2.474) for Windows


The readme document in the download has a list of defects resolved.

-- Disclosure Timeline:
2011-02-04 - Vulnerability reported to vendor
2011-04-29 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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