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HPE Security Bulletin HPSBUX03437 SSRT110025 1

HPE Security Bulletin HPSBUX03437 SSRT110025 1
Posted Feb 18, 2016
Authored by Hewlett Packard Enterprise | Site hpe.com

HPE Security Bulletin HPSBUX03437 SSRT110025 1 - A potential security vulnerability has been identified with HP-UX running HP-UX IPFilter. The vulnerability could be remotely exploited to cause a denial of service (DoS). Note: The vulnerability only exists when HP-UX IPFilter rules are configured for UDP protocol packets and the keep state option is used in that IPFilter rule. Revision 1 of this advisory.

tags | advisory, denial of service, udp, protocol
systems | hpux
advisories | CVE-2016-1987
SHA-256 | 2745eb916db8a309777acd800fa647b1859849b68fee1ffb2d5313663544bfe5

HPE Security Bulletin HPSBUX03437 SSRT110025 1

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Note: the current version of the following document is available here:
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_n
a-c04974114

SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c04974114
Version: 1

HPSBUX03437 SSRT110025 rev.1 - HP-UX IPFilter, Remote Denial of Service (DoS)

NOTICE: The information in this Security Bulletin should be acted upon as
soon as possible.

Release Date: 2016-02-16
Last Updated: 2016-02-16

Potential Security Impact: Remote Denial of Service (DoS)

Source: Hewlett Packard Enterprise, Product Security Response Team

VULNERABILITY SUMMARY
A potential security vulnerability has been identified with HP-UX running
HP-UX IPFilter. The vulnerability could be remotely exploited to cause a
denial of service (DoS).

Note: The vulnerability only exists when HP-UX IPFilter rules are configured
for UDP protocol packets and the keep state option is used in that IPFilter
rule.

References:

PSRT110025
CVE-2016-1987

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX IPFilter A.11.31.18.21

BACKGROUND

CVSS 2.0 Base Metrics
===========================================================
Reference Base Vector Base Score
CVE-2016-1987 (AV:A/AC:H/Au:N/C:N/I:N/A:P) 1.8
===========================================================
Information on CVSS is documented
in HP Customer Notice: HPSN-2008-002

RESOLUTION

HPE has made the following mitigation information available to resolve the
vulnerability for version A.11.31.18.21 of HP-UX IPFilter.

This vulnerability can be mitigated by either of the following actions:

A. Remove the keep state option from udp rules

Search for rules with proto udp and keep state to identify the impacted rule
and remove the keep state option.

Example rules are as follows:
pass in quick on lanN proto udp from <IP-addr1> to <IP-addr2> keep state
pass out quick on lanN proto udp from <IP-addr3> to <IP-addr4> keep state

For the above example rules, remove the keep state from the rule as follows:
pass in quick on lanN proto udp from <IP-addr1> to <IP-addr2>
pass out quick on lanN proto udp from <IP-addr3> to <IP-addr4>

B. Alternatively, HP-UX IPFilter can be downgraded to version A.11.31.18.10

HISTORY
Version:1 (rev.1) - 16 February 2016 Initial release

Third Party Security Patches: Third party security patches that are to be
installed on systems running Hewlett Packard Enterprise (HPE) software
products should be applied in accordance with the customer's patch management
policy.

Support: For issues about implementing the recommendations of this Security
Bulletin, contact normal HPE Services support channel. For other issues about
the content of this Security Bulletin, send e-mail to security-alert@hpe.com.

Report: To report a potential security vulnerability with any HPE supported
product, send Email to: security-alert@hpe.com

Subscribe: To initiate a subscription to receive future HPE Security Bulletin
alerts via Email: http://www.hpe.com/support/Subscriber_Choice

Security Bulletin Archive: A list of recently released Security Bulletins is
available here: http://www.hpe.com/support/Security_Bulletin_Archive

Software Product Category: The Software Product Category is represented in
the title by the two characters following HPSB.

3C = 3COM
3P = 3rd Party Software
GN = HPE General Software
HF = HPE Hardware and Firmware
MU = Multi-Platform Software
NS = NonStop Servers
OV = OpenVMS
PV = ProCurve
ST = Storage Software
UX = HP-UX

Copyright 2016 Hewlett Packard Enterprise

Hewlett Packard Enterprise shall not be liable for technical or editorial
errors or omissions contained herein. The information provided is provided
"as is" without warranty of any kind. To the extent permitted by law, neither
HP or its affiliates, subcontractors or suppliers will be liable for
incidental,special or consequential damages including downtime cost; lost
profits; damages relating to the procurement of substitute products or
services; or damages for loss of data, or software restoration. The
information in this document is subject to change without notice. Hewlett
Packard Enterprise and the names of Hewlett Packard Enterprise products
referenced herein are trademarks of Hewlett Packard Enterprise in the United
States and other countries. Other product and company names mentioned herein
may be trademarks of their respective owners.

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