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
 
 
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System management and security procedures must be reviewed frequently to maintain 
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"HP is broadly distributing this Security Bulletin in order to bring to the attention 
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©Copyright 2004 Hewlett-Packard Development Company, L.P.
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