ESA-2011-003: EMC NetWorker librpc.dll spoofing vulnerability.

[<Security_Alert@xxxxxxx>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

ESA-2011-003: EMC NetWorker librpc.dll spoofing vulnerability.


EMC Identifier: ESA-2011-003

CVE Identifier: CVE-2011-0321


Severity Rating: CVSS v2 Base Score: 8.5 (AV:N/AC:L/Au:N/C:P/I:N/A:C)


Affected products:
EMC NetWorker earlier than 7.5.3.5
EMC NetWorker earlier than 7.6.1.2


Vulnerability Summary:
A vulnerability exists in EMC NetWorker which can be exploited to potentially 
create a denial of service condition or eavesdrop on process communications.


Vulnerability Details:
EMC Networker uses an RPC library to provide a portmapper service within 
nsrexecd. The portmapper restricts access for service commands to the 
localhost. However, the UDP protocol allows malicious users to spoof the source 
address of the network packet making it appear it originated from the 
localhost. This potentially may allow  a remote malicious user to unregister 
existing NetWorker RPC services or register new RPC services.


Problem Resolution:
The following EMC NetWorker products contain resolutions to this issue:


EMC NetWorker version 7.5.3.5
EMC NetWorker version 7.5 SP4 and later
EMC NetWorker version 7.6.1.2 and later


EMC strongly recommends all customers apply the latest patches which contain 
the resolution to this issue, at the earliest opportunity.


Link to remedies:


For 7.5 SP3 and earlier users:
This fix is available  in build 7.5.3.5 and 7.5 SP4.  EMC recommends updating 
to the 7.5 SP4 version.  Registered EMC Powerlink customers can download the 
NetWorker 7.5 SP4 software from Powerlink. For NetWorker Software, navigate in 
Powerlink to Home > Support > Software Downloads and Licensing > Downloads J-O 
> NetWorker.


For 7.6 SP1 and 7.6 users:
The fix is available in 7.6.1.2 and subsequent cumulative build releases.  For 
details on the 7.6.1.x cumulative fix releases including download details, 
refer to the NetWorker 7.6 Cumulative Hotfix Summary document on EMC Powerlink.


Because the view is restricted based on customer agreements, you may not have 
permission to view certain downloads. Should you not see a software download 
you believe you should have access to, follow the instructions in EMC 
Knowledgebase solution emc116045.


For explanation of Severity Ratings, refer to EMC Knowledgebase solution 
emc218831. EMC recommends that all customers take into account both the base 
score and any relevant temporal and environmental scores, which may impact the 
potential severity associated with particular security vulnerability.


Credits:
EMC would like to thank an anonymous researcher working with TippingPoint's 
Zero Day Initiative (http://www.zerodayinitiative.com) for reporting this issue.


EMC Corporation distributes EMC Security Advisories in order to bring to the 
attention of users of the affected EMC products important security information. 
EMC recommends all users determine the applicability of this information to 
their individual situations and take appropriate action. The information set 
forth herein is provided "as is" without warranty of any kind. EMC disclaims 
all warranties, either express or implied, including the warranties of 
merchantability, fitness for a particular purpose, title and non-infringement. 
In no event shall EMC or its suppliers be liable for any damages whatsoever 
including direct, indirect, incidental, consequential, loss of business profits 
or special damages, even if EMC or its suppliers have been advised of the 
possibility of such damages. Some states do not allow the exclusion or 
limitation of liability for consequential or incidental damages so the 
foregoing limitation may not apply.


EMC Product Security Response Center
Security_Alert@xxxxxxx
http://www.emc.com/contact-us/contact/product-security-response-center.htm


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Cygwin)

iEYEARECAAYFAk1AmSsACgkQtjd2rKp+ALyxkwCeIB5VSY1U6/1h/yWAluRlERtj
40sAoIHN3TfWLIq+t9wR0WtmYQknZVws
=ddyY
-----END PGP SIGNATURE-----