Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2002.386 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN:
# HPSBUX0207-205
Sec. Vulnerability in HP-UX ISN
2 August 2002
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AusCERT Security Bulletin Summary
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Product: TCP/IP ISN (Initial Sequence Numbers)
Vendor: Hewlett-Packard
Operating System: HP-UX 11.00
HP-UX 11.04
HP-UX 11.11
Platform: HP9000 Series 700
HP9000 Series 800
Impact: Increased Privileges
Access Required: Remote
Ref: ESB-2001.179
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HEWLETT-PACKARD COMPANY SECURITY BULLETIN: # HPSBUX0207-205
Originally issued: 29 July 2002
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The information in the following Security Bulletin should be acted
upon as soon as possible. Hewlett-Packard Company will not be
liable for any consequences to any customer resulting from customer's
failure to fully implement instructions in this Security Bulletin as
soon as possible.
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PROBLEM: RFC 1948 ISN randomization is now available.
PLATFORM: HP9000 Series 700/800 running HP-UX releases 11.00,
11.04 and 11.11.
DAMAGE: Possible increase in privilege
SOLUTION: Apply the appropriate patch as follows:
for HP randomization on releases:
HP-UX 11.00: PHNE_22397 or subsequent,
HP-UX 11.11: default mode.
for RFC 1948 ISN randomization
HP-UX 11.00: PHNE_26771 or subsequent,
HP-UX 11.04: PHNE_26101 or subsequent,
HP-UX 11.11: PHNE_25644 or subsequent.
MANUAL ACTIONS: none
AVAILABILITY: All patches are available now.
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A. Background
As discussed in CERT Advisory CA-2001-09, Hewlett-Packard now
provides RFC1948 compliant randomization.
B. Recommended solution
The following tcp randomizations are now available:
HP-UX releases 11.00, 11.04, and 11.11 (11i):
HP randomization
RFC 1948 ISN randomization
=================================================================
To enable tcp randomization on HP-UX 11.00, 11.04, and 11.11(11i):
=================================================================
HP randomization
HP-UX release 11.00:
Install PHNE_22397 or subsequent. The HP randomization will
then be the default tcp randomization.
NOTE: This patch has dependencies.
HP-UX release 11.11 (11i):
No patch is required. The HP randomization has always been
implemented in HP-UX 11.11 (11i) and is the default tcp
randomization.
RFC 1948 ISN randomization
HP-UX 11.00: Apply PHNE_26771 or subsequent.
HP-UX 11.04: Apply PHNE_26101 or subsequent.
HP-UX 11.11 (11i): Apply PHNE_25644 or subsequent.
Once the appropriate patch has been applied the RFC 1948 ISN
randomization can be enabled on HP-UX 11.00, 11.04 and 11.11
by executing the following command as root:
ndd -set /dev/tcp tcp_isn_passphrase <secret passphrase>
where <secret passphrase> is any length character
string. Only the first 32 characters will be
retained. If the passphrase is changed the system
should be rebooted.
NOTE: RFC 1948 ISN randomization is not available on
HP-UX release 10.20. Customers who want RFC 1948
ISN randomization should upgrade to HP-UX 11.X and
apply necessary patches as discussed herein.
C. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP IT Resource Center via electronic
mail, do the following:
Use your browser to get to the HP IT Resource Center page at:
http://itrc.hp.com
Use the 'Login' tab at the left side of the screen to login
using your ID and password. Use your existing login or the
"Register" button at the left to create a login, in order to
gain access to many areas of the ITRC. Remember to save the
User ID assigned to you, and your password.
In the left most frame select "Maintenance and Support".
Under the "Notifications" section (near the bottom of
the page), select "Support Information Digests".
To -subscribe- to future HP Security Bulletins or other
Technical Digests, click the check box (in the left column)
for the appropriate digest and then click the "Update
Subscriptions" button at the bottom of the page.
or
To -review- bulletins already released, select the link
(in the middle column) for the appropriate digest.
To -gain access- to the Security Patch Matrix, select
the link for "The Security Bulletins Archive". (near the
bottom of the page) Once in the archive the third link is
to the current Security Patch Matrix. Updated daily, this
matrix categorizes security patches by platform/OS release,
and by bulletin topic. Security Patch Check completely
automates the process of reviewing the patch matrix for
11.XX systems.
For information on the Security Patch Check tool, see:
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=B6834AA"
The security patch matrix is also available via anonymous
ftp:
ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/
On the "Support Information Digest Main" page:
click on the "HP Security Bulletin Archive".
D. To report new security vulnerabilities, send email to
security-alert@hp.com
Please encrypt any exploit information using the
security-alert PGP key, available from your local key
server, or by sending a message with a -subject- (not body)
of 'get key' (no quotes) to security-alert@hp.com.
Permission is granted for copying and circulating this
Bulletin to Hewlett-Packard (HP) customers (or the Internet
community) for the purpose of alerting them to problems,
if and only if, the Bulletin is not edited or changed in
any way, is attributed to HP, and provided such reproduction
and/or distribution is performed for non-commercial purposes.
Any other use of this information is prohibited. HP is not
liable for any misuse of this information by any third party.
________________________________________________________________
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