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HP-UX security bulletins digest
From: IT Resource Center (support_feedback
us-support2-mail.external.hp.com)
Date: Tue May 13 2003 - 09:15:46 CDT
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HP Support Information Digests
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===============================================================================
Digest Name: daily HP-UX security bulletins digest
Created: Tue May 13 7:00:02 EDT 2003
Table of Contents:
Document ID Title
--------------- -----------
HPSBUX0304-255 SSRT3499 SSRT3518 Security Vulnerabilities in OpenSSL rev. 1
HPSBUX0303-251 SSRT3509 Potential Security Vulnerability in CIFS/9000 Server
The documents are listed below.
-------------------------------------------------------------------------------
Document ID: HPSBUX0304-255
Date Loaded: 20030512
Title: SSRT3499 SSRT3518 Security Vulnerabilities in OpenSSL rev. 1
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
-----------------------------------------------------------------
** REVISED 01 **
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0304-255
Originally issued: 24 April 2003
Last revised: 12 May 2003
SSRT3499 SSRT3518 Security Vulnerabilities in OpenSSL
-----------------------------------------------------------------
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.
-----------------------------------------------------------------
PROBLEM:
1. OpenSSL does not use RSA blinding by default, which allows
local and remote attackers to obtain the server's private
key by determining factors using timing differences on (1)
the number of extra reductions during Montgomery reduction,
and (2) the use of different integer multiplication
algorithms.
More details are available at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0147
The problem has been fixed by enabling the blinding flag for
the RSA crypto algothrithms in HP-UX implementations.
2. The SSL and TLS components for OpenSSL 0.9.6i and earlier,
allow remote attackers to perform an unauthorized RSA private
key operation via a modified Bleichenbacher attack. This
attack uses a large number of SSL or TLS connections using
PKCS #1 v1.5 padding that causes OpenSSL to leak information.
More details are available at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0131
IMPACT: Potential information leak.
** REVISED 01 **
PLATFORM: HP9000 Servers running HP-UX release 11.00, 11.11 and
11.22 with versions of the following products are
affected, and represented as:
product-name, version (product-tag/bundle-tag)
---> - hp apache-based web server, 1.3.27.01 or earlier
---> (ApacheStrong/B9415AA)
---> This product includes OpenSSL 0.9.6i
- hp apache-based web server, 2.0.43.04 or earlier
(HPApache/B9416AA, HPApache/B9416BA)
This product includes OpenSSL 0.9.6g
- hp-ux apache-based web server, v.1.0.02.01 or earlier
(hpuxwsAPACHE/hpuxwsApache)
This product includes OpenSSL 0.9.6i.
** REVISED 01 **
SOLUTION: For HP-UX releases 11.00, 11.11 and 11.22 download new
HP Apache product from http://www.software.hp.com/:
---> For ApacheStrong/B9415AA download the following:
---> - hp apache-based web server, 1.3.27.02
---> (ApacheStrong/B9415AA)
---> This product includes OpenSSL 0.9.6i (with patches)
---> http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
---> cgi/displayProductInfo.pl?productNumber=B9415AA132702
For HPApache/B9416AA, HPApache/B9416BA and
hpuxwsAPACHE/hpuxwsApache download the following:
- hp-ux apache-based web server, v.1.0.03.01 or later
(hpuxwsAPACHE/hpuxwsApache)
This product includes OpenSSL 0.9.6i (with patches)
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE
NOTE: No IPv6 solution is available at this time. This Security
Bulletin will be updated when such becomes available.
MANUAL ACTIONS: Yes - Update
Install the product containing the fix.
For customers with HPApache/B9416AA or
HPApache/B9416BA installed, the fix requires
migration to hpuxwsAPACHE/hpuxwsApache and
removing the affected products from the system.
AVAILABILITY: Complete product bundles are available now on
http://www.software.hp.com/
CHANGE SUMMARY: Rev. 01 Added apache-based web server, 1.3.27.02
-----------------------------------------------------------------
** REVISED 01 **
A. Background
The Common Vulnerabilities and Exposures project
<http://cve.mitre.org/> has identified multiple potential
vulnerabilities in the OpenSSL (CAN-2003-0131, CAN-2003-0147).
It affects the following HP product numbers/versions on HP-UX
releases 11.00, 11.11 and 11.22:
---> - hp apache-based web server, 1.3.27.01 or earlier
---> (ApacheStrong/B9415AA)
- hp apache-based web server, 2.0.43.04 or earlier
(HPApache/B9416AA, HPApache/B9416BA)
- hp-ux apache-based web server, v.1.0.02.01 or earlier
(hpuxwsAPACHE/hpuxwsApache)
B. Recommended solution
The OpenSSL Group has released different patches to
OpenSSL 0.9.6i to fix the problems identified in the above
mentioned issues.
** REVISED 01 **
For customers using ApacheStrong/B9415AA, HP has incorporated
OpenSSL 0.9.6i (with patches) in the following product:
- B9415AA: hp apache-based web server 1.3.27.02
For customers using HPApache/B9416AA, HPApache/B9416BA and
hpuxwsAPACHE/hpuxwsApache, HP has incorporated OpenSSL 0.9.6i
(with patches) in the following product:
- hp-ux apache-based web server v.1.0.03.01 or later
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=HPUXWSSUITE
NOTE: No IPv6 solution is available at this time. This
Security Bulletin will be updated when such becomes
available.
** REVISED 01 **
Check for Apache Installation
-----------------------------
To determine if the Apache web server from HP is installed on
your system, use Software Distributor's swlist command. All
three versions products may co-exist on a single system.
For example, the results of the command
swlist -l product | grep -i apache
--> ApacheStrong 1.3.27.01 HP Apache-based Web Server
--> with Strong (128bit) Encryption
HPApache 2.0.39.01.02 HP Apache-based Web Server
hpuxwsAPACHE A.1.0.02.01 HP-UX Apache-based Web Server
Stop Apache
-----------------------------
Before updating, make sure to stop any previous Apache binary.
Otherwise, the previous binary will continue running,
preventing the new one from starting, although the installation
would be successful.
After determining which Apache is installed, stop Apache with
the following commands:
--> for ApacheStrong: /opt/apache/bin/apachectl stop
for HPApache: /opt/hpapache2/bin/apachectl stop
for hpuxwsAPACHE: /opt/hpws/apache/bin/apachectl stop
Download and Install Apache
-----------------------------
- Download Apache from Software Depot using the previously
mentioned links.
- Verify successful download by comparing the cksum with the
value specified on the installation web page.
- Use SD to swinstall the depot.
- For customers with HPApache/B9416AA or HPApache/B9416BA
installed, migrate to hpuxwsAPACHE/hpuxwsApache and
remove the affected products from the system.
Installation of this new version of HP Apache over an existing
HP Apache installation is supported, while installation over a
non-HP Apache is NOT supported.
Removing Apache Installation
----------------------------
If you rather remove Apache from your system than install a
newer version to resolve the security problem, use both
Software Distributor's "swremove" command and also "rm -rf"
the home location as specified in the rc.config.d file "HOME"
variables.
To find the files containing HOME variables in the
/etc/rc.config.d directory:
%ls /etc/rc.config.d | grep apache
apacheconf
hpapache2conf
hpws_apacheconf
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)
<security-alerthp.com>
Fingerprint =
6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59
If you have problems locating the key please write to
security-alerthp.com. Please note that this key is
for signing bulletins only and is not the key returned
by sending 'get key' to security-alerthp.com.
D. To report new security vulnerabilities, send email to
security-alerthp.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-alerthp.com.
-----------------------------------------------------------------
(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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-----End of Document ID: HPSBUX0304-255--------------------------------------
Document ID: HPSBUX0303-251
Date Loaded: 20030512
Title: SSRT3509 Potential Security Vulnerability in CIFS/9000 Server (rev.1)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- -----------------------------------------------------------------
**REVISED 01**
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0303-251
Originally issued: 18 March 2003
Last revised: 12 May 2003
SSRT3509 Potential Security Vulnerability in CIFS/9000 Server
(rev.1)
-----------------------------------------------------------------
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.
-----------------------------------------------------------------
PROBLEM: CIFS/9000 Server is potentially vulnerable to altered
SMB/CIFS network messages.
IMPACT: Potential remote root access.
PLATFORM: All HP9000 servers running CIFS/9000 Server versions up
through A.01.09.02 on HP-UX 11.0, 11.11(11i), and 11.22
**REVISED 01**
SOLUTION: HP-UX 11.0, 11.11, 11.22
--> Download and install the CIFS Server 2.2e version
--> A.01.09.04 or subsequent from software.hp.com.
**REVISED 01**
MANUAL ACTIONS: Yes - Update
--> HP-UX 11.0, 11.11, 11.22
--> Download and install the CIFS Server 2.2e version
--> A.01.09.04 or subsequent from software.hp.com.
AVAILABILITY: CIFS Server 2.2e version A.01.09.04 is available
now from software.hp.com.
CHANGE SUMMARY: Rev.01 - CIFS Server 2.2e version A.01.09.04
available for 11.00, 11.11, 11.22.
-----------------------------------------------------------------
A. Background
Note: The following are not vulnerable:
HP OpenVMS
HP NonStop Servers
HP Tru64 UNIX
HP Secure Web Servers for HP Tru64 UNIX
HP Secure Web Servers for HP Tru64 OpenVMS
As further information becomes available HP
will provide notice of the availability of any
additional Samba updates through standard security
bulletin announcements and information will be
available from your normal HP Services support channel.
CIFS Server version A.01.09.01 and prior may allow modified
SMB/CIFS messages to cause smbd to overwrite portions of its
own process address space. This could potentially be
exploited to gain root access remotely.
The latest version of CIFS Server adds checks for proper
SMB/CIFS messages to prevent invalid smbd memory accesses.
The Samba team has provided a note describing ways to
limit exposure to this vulnerability and future potential
vulnerabilities. Please refer to Section E below.
**REVISED 01**
-->Note: The HP CIFS Server versions do not map directly to
--> original Samba versions. Significant Samba fixes,
--> including security fixes, are backported into the
--> HP CIFS Server. Specific security-related code was
--> backported from 2.2.8a into the current HP CIFS Server
--> source, which is based on Samba 2.2.5. The what(1)
--> output will show the HP version string, for example:
--> A.01.09.04. Samba commands such as "smd -V" or
--> smbstatus will only report the underlying base Samba
--> version, for example: 2.2.5.
B. Recommended solution
**REVISED 01**
-> HP-UX 11.0, 11.11, 11.22
-> Update to version A.01.09.04 (available on software.hp.com).
-> This version includes the fixes provided by the binary
-> replacement files smbd.11.00 (version A.01.09.02) and
-> smbd.11.00.r1 (A.01.09.03) previously available via FTP
-> access.
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)
<security-alerthp.com>
Fingerprint =
6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59
If you have problems locating the key please write to
security-alerthp.com. Please note that this key is
for signing bulletins only and is not the key returned
by sending 'get key' to security-alerthp.com.
D. To report new security vulnerabilities, send email to
security-alerthp.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-alerthp.com.
E. Samba Team notes on protecting an unpatched Samba server
************************************
Protecting an unpatched Samba server
************************************
This is a note on how to provide your Samba server some
protection against the potential vulnerability even
if you are unable to upgrade to the fixed version
immediately. Even if you do upgrade these suggestions
provide additional levels of protection against possible
future vulnerabilities.
Using host based protection
---------------------------
In many installations of Samba the greatest threat comes from
outside the immediate network. By default Samba will accept
connections from any host.
One of the simplest fixes in this case is to use the 'hosts
allow' and 'hosts deny' options in the Samba smb.conf
configuration file to only allow access to your server from a
specific range of hosts. An example might be:
hosts allow = 127.0.0.1 192.168.2.0/24 192.168.3.0/24
hosts deny = 0.0.0.0/0
The above will only allow SMB connections from 'localhost'
(your own computer) and from the two private networks
192.168.2 and 192.168.3. All other connections will be
refused connections as soon as the client sends its first
packet. The refusal will be marked as a 'not listening on
called name' error.
Using interface protection
--------------------------
By default Samba will accept connections on any network
interface that it finds on your system. That means if you
have a ISDN line or a PPP connection to the Internet then
Samba will accept connections on those links. This may not be
what you want.
You can change this behavior using options like the
following:
interfaces = lan* lo0
bind interfaces only = yes
that tells Samba to only listen for connections on interfaces
with a name starting with 'lan' such as lan0, lan1, plus on
the loopback interface called 'lo0'. The name you will need to
use depends on what OS you are using. The example above uses
the common name for ethernet adapters on HP-UX.
If you use the above and someone tries to make a SMB
connection to your host over a PPP interface called 'ppp0',
they will get a TCP connection refused reply. In that
case no Samba code is run at all as the operating system has
been told not to pass connections from that interface to any
process.
Using a firewall
----------------
Many people use a firewall to deny access to services that
they do not want exposed outside their network. This can be a
very good idea, although the methods above should also be used
in case the firewall is not active for some reason.
If you are setting up a firewall then you need to know what
TCP and UDP ports to allow and block. Samba uses the
following:
UDP/137 - used by nmbd
UDP/138 - used by nmbd
TCP/139 - used by smbd
TCP/445 - used by smbd
The last one is important as many older firewall setups may
not be aware of it, given that this port was only added to
the protocol in recent years.
Using a IPC$ share deny
-----------------------
If the above methods are not suitable, then you could also
place a more specific deny on the IPC$ share that is used in
the vulnerability reported in this bulletin. This allows you
to offer access to other shares while denying access to IPC$
from potentially untrustworthy hosts.
To do that you could use:
[ipc$]
hosts allow = 192.168.115.0/24 127.0.0.1
hosts deny = 0.0.0.0/0
this would tell Samba that IPC$ connections are not allowed
from anywhere but the two listed places (localhost and a
local subnet). Connections to other shares would still be
allowed. As the IPC$ share is the only share that is always
accessible anonymously this provides some level of protection
against attackers that do not know a username/password for
your host.
If you use this method then clients will be given an 'access
denied' reply when they try to access the IPC$ share. That
means that those clients will not be able to browse shares,
and may also be unable to access some other resources.
-----------------------------------------------------------------
(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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