SSRT3622 Potential Security Vulnerabilities in Apache HTTP Server
From: Security Alert (secure_at_cup.hp.com)
Date: 10/02/03
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Date: 2 Oct 2003 09:05:38 -0600
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Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0310-284
Originally issued: 01 Oct 2003
SSRT3622 Potential Security Vulnerabilities in Apache HTTP Server
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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: 1. Certain ASN.1 encodings that are rejected as invalid
by the parser can trigger a bug in the deallocation
of the corresponding data structure, corrupting the
stack. This can be used as a denial of service
attack. It is currently unknown whether this can be
exploited to run malicious code. This issue does not
affect OpenSSL 0.9.6.
More details are available at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0545
2. Unusual ASN.1 tag values can cause an out of bounds
read under certain circumstances, resulting in a
denial of service vulnerability.
More details are available at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0543
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0544
3. A malformed public key in a certificate will crash
the verify code if it is set to ignore public key
decoding errors. Exploitation of an affected
application would result in a denial of service
vulnerability.
4. Due to an error in the SSL/TLS protocol handling,
a server will parse a client certificate when one is
not specifically requested.
IMPACT: Potential Denial of Service
PLATFORM: HP9000 Servers running HP-UX release B.11.00, B.11.11,
B.11.20, B.11.22, and B.11.23 with versions of the
following products are affected, and represented as:
product-name, version (product-tag/bundle-tag)
- hp apache-based web server, 2.0.43.04 or earlier
(HPApache/B9416AA)
This product includes OpenSSL 0.9.6b.
- hp-ux apache-based web server, v.1.0.06.02 or earlier
(hpuxwsAPACHE/hpuxwsApache)
This product includes OpenSSL 0.9.6i.
- hp apache-based web server, 2.0.43.04 (with IPv6
support), or earlier (HPApache/B9416BA)
This product includes OpenSSL 0.9.6b.
- hp-ux apache-based web server(with IPv6 support),
v.1.0.07.01 or earlier (hpuxwsAPACHE/hpuxwsApache)
This product includes OpenSSL 0.9.6i.
SOLUTION: For HP-UX releases B.11.00, B.11.11, B.11.20,
B.11.22, and B.11.23 download new HP Apache product
from the ftp site (see below for details).
For HPApache/B9416AA, HPApache/B9416BA and
hpuxwsAPACHE/hpuxwsApache download the following:
- hp-ux apache-based web server (with IPv4)
A.1.0.08.01 or later (hpuxwsAPACHE/hpuxwsApache)
This product includes OpenSSL 0.9.7b + patches.
- hp-ux apache-based web server(with IPv6 support),
B.1.0.08.01 or later (hpuxwsAPACHE/hpuxwsApache)
This product includes OpenSSL 0.9.7b + patches.
MANUAL ACTIONS: Yes - Update
Install the product containing the fix.
For customers with HPApache/B9416AA HPApache/B9416BA
installed, the fix requires removing the affected
products from the system and migration to
hpuxwsAPACHE/hpuxwsApache.
AVAILABILITY: Complete product bundles are available from
the ftp site (see below for details).
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A. Background
An SSL/TLS testing suite developed by the NISCC (National
Infrastructure Security Co-Ordination Centre in the UK) has
identified ASN.1 parsing vulnerabilities in OpenSSL.
The Common Vulnerabilities and Exposures project
<http://cve.mitre.org/> has identified potential
vulnerabilities in the Apache HTTP Server (CAN-2003-0543,
CAN-2003-0544).
AFFECTED VERSIONS
==================
The affected filesets are: (product.fileset)
For IPv4:
HP-UX B.11.00
HP-UX B.11.11
HP-UX B.11.22
HPApache.APACHE2
hpuxwsAPACHE.APACHE2
fix: revision A.1.0.08.01 or subsequent
For IPv6:
HP-UX B.11.11
HP-UX B.11.23
=============
HPApache.APACHE2
hpuxwsAPACHE.APACHE2
fix: revision B.1.0.08.01 or subsequent
END AFFECTED VERSIONS
B. Recommended solution
For customers using HPApache/B9416BA and hpuxwsAPACHE/
hpuxwsApache, HP has incorporated OpenSSL 0.9.7b + patches
in the following product:
- hp-ux apache-based web server version 1.0.08.01 or later
System: hprc.external.hp.com (192.170.19.51)
Login: apache1
Password: apache1
FTP Access: ftp://apache1:apache1@hprc.external.hp.com/
or: ftp://apache1:apache1@192.170.19.51/
or: ftp hprc.external.hp.com
Note: There is an ftp defect in IE5 that may result in
a browser hang. To work around this:
- Select Tools -> Internet Options -> Advanced
- Un-check the option:
[ ] Enable folder view for FTP sites
==================================================
To fix the problem:
1. Determine the affected version.
2. Download and verify the cksum or md5 sum.
3. Install the appropriate Apache depot.
cksum:
2820606652 77844480 A.1.0.08.01.1100.depot
84183799 91555840 A.1.0.08.01.1122.depot
774435972 77875200 B.1.0.08.01.ipv6.depot
871663669 116940800 B.1.0.08.01.1123.depot
MD5:
A.1.0.08.01.1100.depot
4D60A779EEFFD5953EE52371E1F17AD9
A.1.0.08.01.1122.depot
483DBFF44D9B79C04CD1ABF71A692E05
B.1.0.08.01.1123.depot
B8B2D2609D2A43ABAD63BE0A3DC7C61E
B.1.0.08.01.ipv6.depot
866E9B4D3102EA6FF34CCCA8171B43CB
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 might show:
HPApache 2.0.39.01.02 HP Apache-based Web Server
hpuxwsAPACHE A.1.0.05.01 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 HPApache: /opt/hpapache2/bin/apachectl stop
for hpuxwsAPACHE: /opt/hpws/apache/bin/apachectl stop
Download and Install Apache
-----------------------------
- Download Apache from temporary ftp site using the previously
mentioned links.
- Verify successful download by comparing the cksum/md5 with
the value specified on the installation web page.
- Use SD to swinstall the depot.
- For customers with 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
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:
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
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2D2A7D59
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D. To report new security vulnerabilities, send email to
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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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-- Yours truly, HP S/W Security Team WTEC Cupertino, California Return-Path: secure@cup.hp.com Reply-to: security-alert@hp.com
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