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

ZDI-11-168: Multiple Vendor librpc.dll Remote Information Disclosure Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-11-168
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:
IBM
EMC

– Affected Products:
IBM Informix
EMC NetWorker

– TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 52.
For further product information on the TippingPoint IPS, visit:

http://www.tippingpoint.com

– 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
vulnerability.

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 "127.0.0.1". This communication is via UDP and a
valid source address is not required, a udp packet from source address
"127.0.0.1" 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:
CVE-2011-0321
http://archives.neohapsis.com/archives/bugtraq/2011-01/0162.html
http://archives.neohapsis.com/archives/bugtraq/2011-01/att-0162/ESA-2011-003.txt

IBM issued patch May 16, 2011:
CVE-2011-1210
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

– About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

http://twitter.com/thezdi