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Home » Hacking News » Hewlett Packard HPSBUX0305-261: HP-UX Ethernet drivers flaw

Hewlett Packard HPSBUX0305-261: HP-UX Ethernet drivers flaw

by Nikola Strahija on May 27th, 2003 This vulnerability allows remote attackers to harvest potentially sensitive information from network traffic. In some network environments, this vulnerability can also be used to circumvent technologies that divide networks into separate domains, such as VLANs and routers.


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Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0305-261
Originally issued: 27 May 2003
SSRT3451 Potential Security Vulnerability in HP-UX network
drivers (Data Leakage)
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NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.

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: Potential for Ethernet device drivers to reuse packet
data for padding.
Cross-reference: CERT/cc VU#412115 and CVE CAN-2003-0001

IMPACT: Device drivers may not pad frames with null bytes,
potential leakage of kernel memory.

PLATFORM: HP9000 Series 700/800 runnning HP-UX releases 10.20
and 11.00.

SOLUTION: Install appropriate device driver patches:
for HP-UX 11.00
PHNE_28143 s700_800 lan3 LAN product cumulative patch
PHNE_28636 s700_800 EISA 100BT cumulative patch

for HP-UX 10.20
PHNE_28635 s700_800 EISA 100BT cumulative patch
PHNE_28536 s800 LAN products cumulative patch
PHNE_28535 s700 LAN products cumulative patch

MANUAL ACTIONS: No

AVAILABILITY: All patches are available now on .
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A. Background
CERT has reported that network device drivers may reuse old
frame buffer data to pad packets resulting in an information
leakage vulnerability that may allow remote harvesting of
sensitive information from affected devices.
http://www.kb.cert.org/vuls/id/412115

The only HP-UX network device drivers affected are:
btlan0 for EISA on 10.20/11.00
lan3 for NIO on 10.20/11.00

NOT IMPACTED:
HP NonStop Servers,
HP Tru64 UNIX/TruCluster Server,
HP OpenVMS

B. Recommended solution
These patches completely solve the identified problem,
for HP-UX 11.00
PHNE_28143 s700_800 lan3 LAN product cumulative patch
PHNE_28636 s700_800 EISA 100BT cumulative patch

for HP-UX 10.20
PHNE_28635 s700_800 EISA 100BT cumulative patch
PHNE_28536 s800 LAN products cumulative patch
PHNE_28535 s700 LAN products cumulative patch

To identify if your system uses the affected drivers, as
root run ioscan to list all reportable hardware:
#/sbin/ioscan -fkClan
Class I H/W Path Driver S/W State H/W Type Description
============================================================
lan 1 8/20/5/1 btlan0 CLAIMED INTERFACE EISA card

# ioscan -fkClan
Class I H/W Path Driver S/W State H/W Type Description
============================================================
lan 0 56.1 lan3 CLAIMED INTERFACE


NOTE: A reboot will be required after installation of
these patches.

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.

NOTE: Using your itrc account security bulletins can be
found here:
http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin


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. Please note that installing the patches
listed in the Security Patch Matrix will completely
implement a security bulletin _only_ if the MANUAL ACTIONS
field specifies "No."

The Security Patch Check tool can verify that a security
bulletin has been implemented on HP-UX 11.XX systems providing
that the fix is completely implemented in a patch with no
manual actions required. The Security Patch Check tool cannot
verify fixes implemented via a product upgrade.

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".

The PGP key used to sign this bulletin is available from
several PGP Public Key servers. The key identification
information is:

2D2A7D59
HP Security Response Team (Security Bulletin signing only)

Fingerprint =
6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59

If you have problems locating the key please write to
[email protected] Please note that this key is
for signing bulletins only and is not the key returned
by sending 'get key' to [email protected]


D. To report new security vulnerabilities, send email to

[email protected]

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 [email protected]

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(c)Copyright 2003 Hewlett-Packard Company
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
in this document is subject to change without notice.
Hewlett-Packard Company and the names of HP products referenced
herein are trademarks and/or service marks of Hewlett-Packard
Company. Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.

________________________________________________________________

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