ZDI-10-022: IBM Informix librpc.dll Multiple Remote Code Execution- Vulnerabilities

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-10-022: IBM Informix librpc.dll Multiple Remote Code Execution- Vulnerabilities

ZDI-10-022: IBM Informix librpc.dll Multiple Remote Code Execution Vulnerabilities
March 1, 2010

-- CVE ID:

-- Affected Vendors:

-- Affected Products:
IBM Informix

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 5937. 
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-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of both IBM Informix Dynamic Server and EMC
Legato Networker. User interaction is not required to exploit this

The specific flaws exist within the RPC protocol parsing library,
librpc.dll, utilized by the ISM Portmapper service (portmap.exe) bound
by default to TCP port 36890. During authentication, a lack of proper
sanity checking on supplied parameter sizes can result in exploitable
stack and heap based buffer overflows leading to arbitrary code
execution under the context of the SYSTEM user.

-- Vendor Response:
IBM states that this issue was first fixed in: IDS 10.00.TC9, IDS
11.10.TC3 Recommended fix pack version: IDS 10.00.TC10, IDS 11.10.TC3 4.
URL to APAR or fixpack Fix pack download URL:

-- Disclosure Timeline:
2008-02-07 - Vulnerability reported to vendor
2010-03-01 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Sebastian Apelt (sebastian.apelt@siberas.de)

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