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AUSCERT External Security Bulletin Redistribution
ESB-2004.0681 -- HP Security Bulletin HPSBUX01090
SSRT4853 HP-UX Apache with PHP remote Denial of Service,
local elevation of privileges
28 October 2004
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Apache
PHP
Publisher: Hewlett-Packard
Operating System: HP-UX 11.23
HP-UX 11.22
HP-UX 11.11
HP-UX 11.00
Impact: Increased Privileges
Inappropriate Access
Denial of Service
Access: Remote/Unauthenticated
CVE Names: CAN-2004-0811 CAN-2004-0809 CAN-2004-0786
CAN-2004-0751 CAN-2004-0748 CAN-2004-0747
Ref: ESB-2004.0612
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HP SECURITY BULLETIN
HPSBUX01090 REVISION: 0
SSRT4853 rev. 0 HP-UX Apache with PHP remote Denial of Service,
local elevation of privileges, unauthorized access
to restricted resources
NOTICE:
There are no restrictions for distribution of this Bulletin
provided that it remains complete and intact.
The information in this Security bulletin should be acted upon
as soon as possible.
INITIAL RELEASE:
26 October 2004
POTENTIAL SECURITY IMPACT:
Remote denial of service, local elevation of privilege,
unauthorized access to restricted resources.
SOURCE:
HEWLETT-PACKARD COMPANY
HP Software Security Response Team
REFERENCES:
CAN-2004-0786, CAN-2004-0747, CAN-2004-0751, CAN-2004-0748,
CAN-2004-0809, CAN-2004-0811
VULNERABILITY SUMMARY:
Several potential security vulnerabilities have been identified in
Apache Web Server and PHP running on HP-UX where a remote
user may be able to cause a Denial of Service (DoS), obtain
local elevataton of privileges or gain unauthorized access to
restricted resources.
1. The IPv6 URI parsing routines in the apr-util library for
Apache 2.0.50 and earlier allow remote attackers to cause
a denial of service (child process crash) via a certain URI,
as demonstrated using the Codenomicon HTTP Test Tool.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0786
2. Buffer overflow in Apache 2.0.50 and earlier allows local
users to gain apache privileges via a .htaccess file that
causes the overflow during expansion of environment
variables.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0747
3. The char_buffer_read function in the mod_ssl module for
Apache 2.x, when using reverse proxying to an SSL server,
allows remote attackers to cause a denial of service
(segmentation fault).
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0751
4. mod_ssl in Apache 2.0.50 and earlier allows remote
attackers to cause a denial of service (CPU consumption)
by aborting an SSL connection in a way that causes an
Apache child process to enter an infinite loop
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0748
5. The mod_dav module in Apache 2.0.50 and earlier allows
remote attackers to cause a denial of service (child process
crash) via a certain sequence of LOCK requests for a
location that allows WebDAV authoring access.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0809
6. Vulnerability in Apache 2.0.51 prevents the merging of the
Satisfy directive, which could allow attackers to obtain
access to restricted resources contrary to the specified
authentication configuration.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0811
SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.00, B.11.11, B.11.22, and B.11.23 running the
currently suppported versions of hpuxwsAPACHE HP-UX
Apache-based Web Server.
BACKGROUND:
AFFECTED VERSIONS
Note: To determine if a system has an affected version,
search the output of "swlist -a revision -l fileset"
for an affected fileset. Then determine if the
recommended patch or update is installed.
For IPv4:
HP-UX B.11.00
HP-UX B.11.11
=============
hpuxwsAPACHE
action: install revision A.2.0.52.00 or subsequent
HP-UX B.11.22
=============
hpuxwsAPACHE
action: migrate to B.11.23
For IPv6:
HP-UX B.11.11
=============
hpuxwsAPACHE,revision=B.1.0.00.01
hpuxwsAPACHE,revision=B.1.0.07.01
hpuxwsAPACHE,revision=B.1.0.08.01
hpuxwsAPACHE,revision=B.1.0.09.01
hpuxwsAPACHE,revision=B.1.0.10.01
hpuxwsAPACHE,revision=B.2.0.48.00
hpuxwsAPACHE,revision=B.2.0.49.00
hpuxwsAPACHE,revision=B.2.0.50.00
action: install revision B.2.0.52.00 or subsequent
HP-UX B.11.23
=============
hpuxwsAPACHE
action: install revision B.2.0.52.00 or subsequent
END AFFECTED VERSIONS
RESOLUTION:
NOTE: Support ended for HP-UX Web Server Suite for HP-UX 11i
v1.6 (B.11.22) after March 31, 2004. HP-UX Web
Server Suite for HP-UX 11i v1.6 (B.11.22) is no
longer available or supported.
Users of this software are encouraged to update to
HP-UX 11i v2 (B.11.23) and install the latest HP-UX
Web Server Suite for HP-UX 11i v2.
Please write to security-alert@hp.com for more
information.
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
hpuxwsAPACHE B.2.0.49.00 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 hpuxwsAPACHE: /opt/hpws/apache[32]/bin/apachectl stop
Download and Install Apache
- - ----------------------------------
- - - Download Apache from Software Depot:
< http://software.hp.com>
- - - Verify successful download by comparing the cksum with
the value specified on the installation web page.
- - - Use SD to swinstall the depot.
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 prefer to remove Apache from your system instead of
installing 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.
%ls /etc/rc.config.d | grep apache
hpapache2conf
hpws_apache[32]conf
MANUAL ACTIONS: Yes - Update plus other actions
Install the product containing the fix.
BULLETIN REVISION HISTORY:
Revision 0 - 26 October 2004
Initial release
* The software product category that this Security Bulletin
relates to is represented by the 5th and 6th characters of the
Bulletin number: GN=General, MA=Management Agents,
MI=Misc. 3rd party, MP=HP-MPE/iX, NS=HP NonStop Servers,
OV=HP OpenVMS, PI=HP Printing & Imaging, ST=HP Storage,
TU=HP Tru64 UNIX, TL=Trusted Linux, UX=HP-UX, VV=Virtual Vault
SUPPORT: For further information, contact HP Services support
channel.
SUBSCRIBE: To initiate a subscription to receive future HP
Security Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php?regioncode
=NA&langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC
On the web page:
Driver and Support Alerts/Notifications Sign-up: Product Selection
Under Step1: your products
1. Select product category:
- a minimum of servers must be selected.
2. Select product family or search:
- a minimum of one product must be selected.
3. Add a product:
- a minimum of one product must be added.
In Step 2: your operating system(s)
- check ALL operating systems for which alerts are required.
Complete the form and Save.
To update an existing subscription:
http://h30046.www3.hp.com/subSignIn.php
Log in on the web page Subscriber's choice for Business: sign-in.
On the Web page: Subscriber's Choice: your profile summary
- - - use Edit Profile to update appropriate sections.
Note: In addition to the individual alerts/notifications for the
selected operating systems/products, subscribers will
automatically receive one copy of alerts for non-operating system
categories (i.e., a subscriber who signs up for all six operating
system alerts will only receive one copy of all the non-operating
system alerts).
HP-UX SPECIFIC SECURITY BULLETINS*:
The HP-UX Security Patch Matrix is available here:
http://itrc.hp.com/service/cki/docDisplay.do?
docId=hpuxSecurityMatrix
Or via anonymous ftp:
ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/
The HP-UX Security Patch Matrix, updated daily, categorizes
security patches by platform/OS release, and by Bulletin topic.
The Security Patch Check tool completely automates the process of
reviewing the Security Patch Matrix for HP-UX 11.XX Versions.
NOTE: Installing patches listed in the Security Patch Matrix will
completely implement the RESOLUTION in the Security Bulletin
_only_ if there are no MANUAL ACTIONS included.
The Security Patch Check tool can also verify that a Security
Bulletin RESOLUTION has been implemented on HP-UX 11.XX Versions
provided that no MANUAL ACTIONS were included. The Security Patch
Check tool cannot verify patches implemented via 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
REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: security-alert@hp.com. It is
strongly recommended that security related information being
communicated to HP be encrypted using PGP, especially exploit
information. To obtain the security-alert PGP key please send an
e-mail message to security-alert@hp.com with the Subject of
'get key' (no quotes).
System management and security procedures must be reviewed
frequently to maintain system integrity. HP is continually
reviewing and enhancing the security features of software products
to provide customers with current secure solutions.
"HP is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected HP products the
important security information contained in this Bulletin. HP
recommends that all users determine the applicability of this
information to their individual situations and take appropriate
action. HP does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently,
HP will not be responsible for any damages resulting from user's
use or disregard of the information provided in this Bulletin.
To the extent permitted by law, HP disclaims all warranties,
either express or implied, including the warranties of
merchantability and fitness for a particular purpose, title
and non-infringement."
(c)Copyright 2004 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company 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 Company and the names of Hewlett-Packard
products referenced herein are trademarks of Hewlett-Packard
Company 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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===========================================================================
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The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
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