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**REVISED 03**
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0310-290
Originally issued: 08 October 2003
Last revised: 28 June 2004
SSRT3622 rev.3 HP-UX Bind v920 Denial of Service (DoS)
-----------------------------------------------------------------

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. 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...=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...=CAN-2003-0543
http://cve.mitre.org/cgi-bin/cvename...=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 releases B.11.00, B.11.11,
B.11.22, and B.11.23, only with the BINDv920 installed.

**REVISED 03**
SOLUTION: Until a product upgrade is available, download and
install the appropriate depot from the ftp site
(see below).

--> Bind9.2 for B.11.00 BINDv920 version 003
Bind9.2 for B.11.11 BINDv920 version 005
Bind9.2 patch for B.11.22 PHNE_29859.depot
Bind9.2 patch for B.11.23 PHNE_30465.depot.11.23.gz

**REVISED 03**
MANUAL ACTIONS: Yes - NonUpdate
--> for B.11.00 download web upgrade
for B.11.11 download web upgrade
for B.11.22 use the temporary depot
for B.11.23 use the temporary depot
Install the product containing the fix.

AVAILABILITY: The depots or patch are available now, via ftp
(see below).
This bulletin will be updated when a product
upgrade is available.

CHANGE SUMMARY: Rev.01 added web upgrade for B.11.11
Rev.02 added B.11.23 depot
Rev.02 added B.11.11 web upgrade
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**REVISED 03**
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.


AFFECTED VERSIONS

The following is a list by HP-UX revision 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.

HP-UX B.11.00
=============
BINDv920.INETSVCS-BIND
--> action: install revision B.11.00.01.003 or subsequent

HP-UX B.11.11
=============
BINDv920.INETSVCS-BIND
action: install revision B.11.11.01.005 or subsequent

HP-UX B.11.22
=============
InternetSrvcs.INETSVCS2-RUN
action: install PHNE_29859.depot

HP-UX B.11.23
=============
InternetSrvcs.INETSVCS2-RUN
action: install PHNE_30465.depot.11.23.gz

END AFFECTED VERSIONS


**REVISED 03**
B. Recommended solution
Note: These fixes should be applied to all systems using
DNS, including those systems with client programs only.

Notes on Bind Versions (B.11.00 and B.11.11)
=============================================

Bind is available on B.11.00 and B.11.11 as part of
the base operating system and as a web upgrade.
Both versions (base os and web upgrade) may be
installed on a system simultaneously. Only one
version can be active. The active version can
be changed via a script.

The base os versions are updated via patches. The
web upgrade versions are updated by installing a
later web upgrade. The web upgrade versions are
not patched, instead are simply newer versions.

If a web upgrade version is active it is not possible
to patch the base os version. It is necessary to
switch to the base os version with the following
command before applying the patch:

/usr/bin/enable_inet -r bind

If you are running a web upgrade version and do not
intend to re-enable the base os version, it is not
necessary to patch the base os version. However,
since the base os version can be re-enabled with
the script, you may want to patch the base os version
even though it is not active. Similarly, if you have
installed a web upgrade version and have switched
back to the base os version, you may want to update
to the latest web upgrade version or use swremove(1)
to remove the web upgrade version entirely.

Identifying the Active Version (B.11.00/B.11.11)
================================================

Execute the following command:

what /usr/sbin/named | grep named

The bind version will be on the named line.
For example:

named 9.2.0 Thu Jul 18 11:58:39 GMT 2002


Identifying the Web Upgrade Version (B.11.00/B.11.11)
================================================== ===

If the file /usr/contrib/bind/usr/sbin/named exists,
execute the following:

what /usr/contrib/bind/usr/sbin/named | grep named

The bind version will be on the named line.
If the version is anything other than 9.2.0, this bulletin
does not apply to the system being examined.

Until a product upgrade is available, download and install
install the appropriate depot from the ftp site.

1a). For B.11.22 and B.11.23, download the
appropriate .depot.gz from the ftp site.
(This file is temporary and will be deleted when a
product upgrade is available from itrc.hp.com).

System: hprc.external.hp.com (192.170.19.51)
Login: bind920
Password: bind920

FTP Access: ftp://bind920:bind920@hprc.external.hp.com/
or: ftp://bind920:bind920@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

1b). For B.11.11 download BINDv920 version 005 from web
upgrade at: <http://software.hp.com>

--> 1c). For B.11.00 download BINDv920 version 003 from web
upgrade at: <http://software.hp.com>

==================================================
2. To fix the problem, copy the appropriate depot file to
a protected directory and unpack it.

cksum:
1640049049 12927378 PHNE_29859.depot.gz
2267058676 12373022 PHNE_30465.depot.11.23.gz

md5:
PHNE_29859.depot.gz
0B306B5E4353D157F0120B719D8D38D3
PHNE_30465.depot.11.23
1E51AA9DAD568F81B09117250DBA1383

3. Install the appropriate depot using swinstall(1).

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--
Yours truly,
HP S/W Security Team
WTEC Cupertino, California


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