(HP Issues Fix for Apach on HP-UX) OpenSSL SSL/TLS Handshade Flaws May Let Remote Users Crash OpenSSL-based Applications
SecurityTracker Alert ID: 1009941|
SecurityTracker URL: http://securitytracker.com/id/1009941
(Links to External Site)
Date: Apr 26 2004
Denial of service via network|
Fix Available: Yes Vendor Confirmed: Yes |
Version(s): prior to 2.03|
Some vulnerabilities were reported in OpenSSL, primarily involving the processing of SSL/TLS protocol handshakes. A remote user can cause OpenSSL to crash.|
It is reported that there is a null-pointer assignment in the do_change_cipher_spec() function [CVE: CVE-2004-0079]. A remote user can perform a specially crafted SSL/TLS handshake with a target server to cause OpenSSL to crash on the target system. This may cause the application using OpenSSL to crash.
All versions of OpenSSL from 0.9.6c to 0.9.6k inclusive and from 0.9.7a to 0.9.7c inclusive are reportedly vulnerable to this null-pointer bug.
It is also reported that there is a flaw in performing SSL/TLS handshakes using Kerberos ciphersuites [CVE: CVE-2004-0112]. A remote user can perform a specially crafted SSL/TLS handshake against a server that is using Kerberos ciphersuites to cause OpenSSL to crash on the target system.
OpenSSL versions 0.9.7a, 0.9.7b, and 0.9.7c are reported to be vulnerable to this Kerberos handshake bug.
It is also reported that a remote user may be able to cause OpenSSL to enter an infinite loop due to a flaw in a patch introduced in 0.9.6d [CVE: CVE-2004-0081].
The vendor credits Dr. Stephen Henson of the OpenSSL core team as well as Codenomicon for supplying their TLS Test Tool and Joe Orton of Red Hat for performing the majority of the testing.
A remote user can cause OpenSSL to crash, which may cause an application using OpenSSL to crash. The specific impact depends on the application that uses the OpenSSL library.|
HP has issued a fix for HP-UX. For customers using HPApache/B9416BA and hpuxwsAPACHE/hpuxwsApache, HP has incorporated the fixed OpenSSL 0.9.7d in hp-ux apache-based web server v.2.03 or later, available at:|
See the Source Message for installation instructions.
Vendor URL: www2.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01019 (Links to External Site)
Boundary error, Exception handling error, State error|
|Underlying OS: UNIX (HP/UX)|
|Underlying OS Comments: HP-UX B.11.00, B.11.11, B.11.22, B.11.23|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
-----BEGIN PGP SIGNED MESSAGE-----
HP SECURITY BULLETIN
HPSBUX01019 REVISION: 0
SSRT4717 rev.0 Remote denial of service in Apache OpenSSL SSL/TLS
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 April 2004
LAST UPDATED: 25 April 2004
POTENTIAL SECURITY IMPACT: Remote denial of service
SOURCE: HEWLETT-PACKARD COMPANY
HP Software Security Response Team
REFERENCES: CAN-2003-0079, CAN-2004-0112, CERT TA04-078A
1. The do_change_cipher_spec function in OpenSSL allows remote
attackers to cause a denial of service via a crafted SSL/TLS
handshake that triggers a null dereference.
2. The SSL/TLS handshaking, when using Kerberos ciphersuites,
does not properly check the length of Kerberos tickets during a
handshake, which allows remote attackers to cause a denial of
service via a crafted SSL/TLS handshake that causes an out-of-
SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP9000 Servers running HP-UX release B.11.00, B.11.11, 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.2.01 or earlier
(hpuxwsAPACHE/hpuxwsApache). This product includes OpenSSL 0.9.7c.
- - 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.2.01 or
earlier (hpuxwsAPACHE/hpuxwsApache). This product includes
Two potential security vulnerabilities have been identified in
OpenSSL by NISCC (224012/1 and 224012/2). The Common
Vulnerabilities and Exposures project <http://cve.mitre.org/> has
referenced them as the following CAN-2004-0079, and CAN-2004-0112.
The CERT summary is TA04-078A.
The following is a list of affected filesets or patches and fix
information. To determine if a system has an affected version,
search the output of "swlist -a revision -l fileset" for an
affected fileset or patch, then determine if a fixed revision or
applicable patch is installed.
action: install hp-ux apache-based web server, v.2.03 or later
END AFFECTED VERSIONS
The OpenSSL group has released patches to fix the vulnerabilities
inOpenSSL 0.9.7d. For customers using HPApache/B9416BA and
hpuxwsAPACHE/hpuxwsApache, HP has incorporated OpenSSL 0.9.7d in
the following product:
- - hp-ux apache-based web server v.2.03 or later
Support ended for HP-UX Web Server Suite for HP-UX 11i v1.6
(11.22) after March 31, 2004. Starting from this release HP-UX
Web Server Suite for HP-UX 11i v1.6 (11.22) is no longer
available or supported. Users of HP-UX Web Server Suite on HP-UX
11i v1.6 are encouraged to update to HP-UX 11i v2 (11.23) and
install the latest HP-UX Web Server Suite for HP-UX 11i v2.
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
HPApache 2.0.39.01.02 HP Apache-based Web Server
hpuxwsAPACHE A.2.01 HP-UX Apache-based Web Server
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 Software Depot using the previously
- - 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/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
%ls /etc/rc.config.d | grep apache
Please write to firstname.lastname@example.org to request a PGP signed
version of this bulletin.
MANUAL ACTIONS: Yes - Update
Yes - Update
Install the product containing the fix.
For customers with HPApache/B9416AA HPApache/B9416BA installed,
the fix requires migration to hpuxwsAPACHE/hpuxwsApache and
removing the affected products from the system.
* 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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HP-UX SPECIFIC SECURITY BULLETINS*:
To review previously published Security Bulletins for HP-UX:
The HP-UX Security Patch Matrix is available here:
Or via anonymous ftp:
The HP-UX Security Patch Matrix, updated daily, categorizes
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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
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REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: email@example.com. It is
strongly recommended that security related information being
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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
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Copyright 2004 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
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