ZDI-11-036: IBM DB2 db2dasrrm receiveDASMessage Remote Code- Execution Vulnerability

From: ZDI Disclosures <zdi-disclosures@tippingpoint.com>
To: 'full-disclosure@lists.grok.org.uk' <full-disclosure@lists.grok.org.uk>,'bugtraq@securityfocus.com' <bugtraq@securityfocus.com>
Subject: ZDI-11-036: IBM DB2 db2dasrrm receiveDASMessage Remote Code- Execution Vulnerability

ZDI-11-036: IBM DB2 db2dasrrm receiveDASMessage Remote Code Execution Vulnerability


January 31, 2011

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

-- Affected Vendors:

-- Affected Products:
IBM DB2 Universal Database

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of IBM DB2. Authentication is not required to
exploit this vulnerability. 

The flaw exists within the db2dasrrm component which listens by default
on TCP port 524. When allocating a buffer within receiveDASMessage a
user supplied length is used as a parameter to malloc(). This buffer is
later copied into without any bounds checking and can be made to
overflow. A remote attacker can exploit this vulnerability to execute
arbitrary code under the context of the das user user.

-- Vendor Response:
IBM states:
v9.1 fp10   
IC71203  https://www-304.ibm.com/support/entdocview.wss?uid=swg1IC71203 

v9.5 fp7 
IC72028  https://www-304.ibm.com/support/entdocview.wss?uid=swg1IC72028

v9.7 fp4
IC72029  https://www-304.ibm.com/support/entdocview.wss?uid=swg1IC72029

-- Disclosure Timeline:
2010-08-25 - Vulnerability reported to vendor
2011-01-31 - Coordinated public release of advisory

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

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