ZDI-11-168: Multiple Vendor librpc.dll Remote Information- Disclosure 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-11-168: Multiple Vendor librpc.dll Remote Information- Disclosure Vulnerability

ZDI-11-168: Multiple Vendor librpc.dll Remote Information Disclosure Vulnerability
May 16, 2011

-- CVE ID:
CVE-2011-0321 & CVE-2011-1210

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

-- Affected Vendors:

-- Affected Products:
IBM Informix
EMC NetWorker

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-- Vulnerability Details:
This vulnerability allows remote attackers to register RPC services on
vulnerable installations of EMC Legato Networker and IBM Informix
Dynamic Server. Authentication is not required to exploit this

The flaw exists within the librpc.dll component which listens by default
on UDP port 111. When handling the pmap_set request the process verifies
the source address is "". This communication is via UDP and a
valid source address is not required, a udp packet from source address
"" can be created sent to this service allowing a remote
attacker to register and unregister RPC services. A remote attack can
use this vulnerability to create a denial of service condition or
eavesdrop on process communications.

-- Vendor Response:

EMC fix posted January 31, 2011:

IBM issued patch May 16, 2011:
11.10 - http://www.ibm.com/support/docview.wss?uid=swg1IC76179
11.50 - http://www.ibm.com/support/docview.wss?uid=swg1IC76177
11.70 - http://www.ibm.com/support/docview.wss?uid=swg1IC76178

-- Disclosure Timeline:
2010-11-15 - Vulnerability reported to vendor
2011-05-16 - Coordinated public release of advisory

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

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