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Home » Hacking News » Hewlett Packard SSRT3531: sendmail buffer overflow

Hewlett Packard SSRT3531: sendmail buffer overflow

by Nikola Strahija on April 9th, 2003 A potential buffer overflow has been found in sendmail which, if exploited, could allow local and remote attackers unauthorized privileged access or denial-of-service.

Hash: SHA1


TITLE: SSRT3531 - HP Tru64 UNIX, HP-UX sendmail buffer
overflow Potential Security Vulnerability

- ----------------------------------------------------------------------

NOTICE: There are no restrictions for distribution of this Bulletin
provided that it remains complete and intact.

RELEASE DATE: 3 April 2003


Software Security Response Team

REFERENCE: SSRT3531, CERT CA-2003-12, SSRT3469


This bulletin will be posted to the support website within 24 hours
of release to - Use the SEARCH IN feature box,
enter SSRT3531 in the search window.

SSRT3531 sendmail - (Severity - High)

A potential security vulnerability has been reported that may result
in unauthorized Privileged Access or a Denial of Service (DoS).
This potential vulnerability may be in the form of local and remote
security domain risks.


HP Tru64 UNIX V5.1B HP-UX release 11.22

HP-UX release11.11 (11i)

HP Tru64 UNIX V5.1A HP-UX release 11.04 (VVOS)

HP Tru64 UNIX V5.1 HP-UX release 11.00

HP Tru64 UNIX V5.0A HP-UX release 10.20

HP Tru64 UNIX V4.0G HP-UX release 10.10

HP Tru64 UNIX V4.0F

HP AlphaServer SC (Sierra Cluster)

HP Internet Express V5.4, V5.7, V5.8, V5.9, V6.0

HP AltaVista Firewall (AVFW98 / Raptor EC)

HP NonStop-UX (PUMA and Whitney platforms)

HP ProLiant Servers



HP NonStop Servers




Early Release Patches (ERPs) are now available for all supported
versions of HP Tru64 UNIX and HP TruCluster Server. The ERP
kits use dupatch to install and will not install over any Customer
Specific Patches (CSPs) which have file intersections with the ERPs.
Contact your normal support channel and request HP Tru64 services
elevate a case to Support Engineering if a CSP must be merged with
one of the ERPs.

The following ERP kits are applicable to any system running HP Tru64
UNIX and HP TruCluster Server software. The ERPs are designed for
clustered and non-clustered systems.

Please review the README file for each patch prior to installation.

The ERP kits DO have file intersections with the following previously
released ERPs: SSRT3469 - HP Tru64 UNIX sendmail Potential
Security Vulnerability The Early Release Patch (ERP) corrections
in this Security Bulletin contain the corrections in SSRT3469 and are
designed to install standalone or seamlessly over the previous
SSRT3469 patch kits.

Checking sendmail version information

To verify installation of the patchkit please run the following
command. You should see the patch information indicating the
security patches have been applied to your version of sendmail.

# /usr/sbin/sendmail -d0.1 Version 8.9.3
Includes patches for: SSRT3469 SSRT3531

For alternatives to using the Dupatch ERP kit solutions provided
below please see the following Web page:

HP Tru64 UNIX/TruCluster Server V5.1B
Prerequisite: V5.1B with PK1 (BL1) installed
ERP Kit Name : T64V51BB1-C0008000-17812-ES-20030403.tar
Kit Location :

HP Tru64 UNIX/TruCluster Server 5.1A
Prerequisite: V5.1A with PK4 (BL21) installed
ERP Kit Name: T64V51AB21-C0112900-17770-ES-20030402.tar
Kit Location:

HP Tru64 UNIX/TruCluster Server V5.1
Prerequisite: V5.1 with PK6 (BL20) installed
ERP Kit Name: T64V51B20-C0176700-17773-ES-20030402.tar
Kit Location:

HP Tru64 UNIX/TruCluster Server 5.0A
PREREQUISITE: Tru64 UNIX/TruCluster Server with PK3 (BL17) installed
Please submit an IPMT case to request the 5.0A patch kit for this

HP Tru64 UNIX/TruCluster Server V4.0G
Prerequisite: V4.0G with PK3 (BL17) installed
ERP Kit Name : T64V40GB17-C0029200-17810-ES-20030403.tar
Kit Location:

HP Tru64 UNIX/TruCluster V4.0F
Prerequisite: V4.0F with PK7 (BL18) installed
ERP Kit Name: DUV40FB18-C0093400-17811-ES-20030403.tar
Kit Location:

Please review the README file for each patch prior to installation.

The fixes contained in the ERP kits will be available in the
following mainstream patch kits:

HP Tru64 UNIX 5.1B PK2
HP Tru64 UNIX 5.1A PK5
HP Tru64 UNIX 4.0G PK4
HP Tru64 UNIX 4.0F PK8
Information on how to verify MD5 and SHA1 checksums is
available at:

After completing the update, HP strongly recommends that you perform
an immediate backup of the system disk so that any subsequent
restore operation begin with updated software. Otherwise, the updates
must be re-applied after a future restore operation. Also, if at
some future time the system is upgraded to a later patch release or
version release, reinstall the appropriate ERP.

HP AlphaServer SC (Sierra Cluster)

Customer should contact their normal HP support channel and request
early release patch kits for case SSRT3531 sendmail



HP has provided notice of the availability of any necessary solutions
through the standard Security Bulletin announcement Security Bulletin
HPSBUX0304-253 and is available from your normal HP Services
support channel and will be available from

AVAILABILITY: Fixes are available for 10.20, 11.00, 11.04(VVOS),
and 11.11. This bulletin will be revised when
fixes are available for 10.10 and 11.22

Please review the Security Bulletin and README file(s) prior to

HP Internet Express for Tru64 UNIX

For any additional detail or questions, please contact your normal
HP Support channel for HP Internet Express for HP Tru64 UNIX.

HP AltaVista Firewall

As the AltaVista Firewall SMTP Mail proxy invokes the sendmail
program locally on the server it's installed on making it necessary
to upgrade this version of Sendmail to the version which has been
produced by the HP Tru64 UNIX engineering group in response to
this reported potential sendmail vulnerability.

Please contact your normal HP (AVFW98 / Raptor EC) Support channel
for any additional solution information.

HP NonStop-UX

Please contact your normal HP NonStop-UX (PUMA and
Whitney platforms) Support channel for any additional
solution information.

HP ProLiant Servers

A cumulative solution is available from Sendmail Inc. and the
Sendmail Consortium that corrects the security issues and provides
a security patch for systems running Sendmail as their mail transfer
agent. The commercial "Sendmail Switch" patch is located at the
following Sendmail Inc. website

IMPORTANT: Servers that have received the Sendmail security update
at the beginning of March are still potentially exposed by this
recent security vulnerability. However, the current security patch
provides a cumulative solution for the issue announced at the end of
March and the recently discovered issue. See the Resolution section
for information on the current security patch.


If running Open Source Sendmail, refer to the following Sendmail
Consortium URL for patch details or upgrades:

Additional solution information is available in article available by
using the search window at (enter: CB0165W)

SUPPORT: For further information, contact HP Services.

SUBSCRIBE: To subscribe to automatically receive future Security
Advisories from the Software Security Response Team via electronic

REPORT: To report a potential security vulnerability with any HP
supported product, send email to: [email protected]

As always, HP urges you to periodically review your system management
and security procedures. HP will continue to review and enhance the
security features of its products and work with our customers to
maintain and improve the security and integrity of their systems.

"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
provided in this Bulletin."

(c)Copyright 2001, 2003 Hewlett-Packard Development Company, L.P.
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 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.

Version: PGP 7.0.1


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