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Category:   Application (E-mail Server)  >   Sendmail Vendors:   Sendmail Consortium
(HP Issues Fix) Sendmail Race Condition in Signal Handler May Let Remote Users Trigger a Buffer Overflow to Execute Arbitrary Code
SecurityTracker Alert ID:  1015831
SecurityTracker URL:  http://securitytracker.com/id/1015831
CVE Reference:   CVE-2006-0058   (Links to External Site)
Updated:  Aug 2 2006
Original Entry Date:  Mar 27 2006
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 8.13.6
Description:   A vulnerability was reported in Sendmail. A remote user may be able to execute arbitrary code on the target system.

Under certain specific timing conditions, a remote user can send specially crafted e-mail data to the target system to exploit a race condition in a signal handler and trigger a buffer overflow. This may allow the remote user to execute arbitrary code on the target system with the privileges of the sendmail process.

ISS discovered this vulnerability.

The original advisory is available at:

http://xforce.iss.net/xforce/xfdb/24584

Impact:   A remote user can execute arbitrary code on the target system with the privileges of the sendmail process (typically root privileges).
Solution:   HP has issued the following fixes, available via ftp:

System: hprc.external.hp.com (192.170.19.100)
Login: sendmail
Password: sendmail (NOTE: CASE-sensitive)

ftp://sendmail:sendmail@hprc.external.hp.com/
or
ftp://sendmail:sendmail@192.170.19.100/

For sendmail 8.13.3, HP-UX B.11.23
sendmail -bs banner:
Sendmail version 8.13.3 - Revision 1.003 - 2006/05/24
what(1) string:
Sendmail version 8.13.3 - Revision 1.003 - 05/24/2006

For sendmail 8.13.3, HP-UX B.11.11
sendmail -bs banner:
Sendmail version 8.13.3 - Revision 2.004 - 2006/06/29
what(1) string:
Sendmail version 8.13.3 - Revision 2.004 - 06/29/2006

For sendmail 8.11.1, HP-UX B.11.23
Note: If UNOF_INET31734_1.depot or UNOF_INET31734_3.depot or UNOF_INET31734_4.depot has been installed, they must be removed using swremove(1M) before installing PHNE_34689.
sendmail -bs banner:
Sendmail 8.11.1 (Revision 1.09)/8.9.3
what(1) string:
version.c 8.11.1 (Berkeley) - 28th June 2006 (PHNE_34689)

For sendmail 8.11.1, HP-UX B.11.11
sendmail-811_10.depot
cksum 3720753575 2949120
md5 01f5e7c1a67c0b0a1103abdaa2907f21
sendmail -bs banner:
Sendmail 8.11.1 (Revision 1.10)
what(1) string:
version.c 8.11.1 (Berkeley) - (Revision 1.10) - 17th July 2006

For sendmail 8.11.1, HP-UX B.11.00
sendmail -bs banner:
Sendmail 8.11.1 - (Revision 1.09)
what(1) string:
version.c 8.11.1 (Berkeley) - (Revision 1.09) - 4th July 2006

For sendmail 8.9.3, HP-UX B.11.11
If UNOF_INET_29774_3.depot or previous is installed, remove it using swremove(1M). Then install:
PHNE_34936 or subsequent

For sendmail 8.9.3, HP-UX B.11.00
If UNOF_INET_29772_3.depot or previous is installed, remove it using swremove(1M). Then install:
PHNE_34900 or subsequent

For sendmail 8.9.3, HP-UX B.11.04
If UNOF_INET_29772_3.depot or previous is installed, remove it using swremove(1M). Then install:
PHNE_34927 or subsequent
sendmail -bs banner:
Sendmail 8.9.3 (PHNE_32006)/8.9.3; Fri, 7 Jul 2006
what(1) string:
version.c 8.9.3.1 (Berkeley) 11/05/2006 (PHNE_32006)
Special Installation Instructions - Note: sendmail is not supported in daemon mode on VVOS platforms. It is provided as a mailing agent (outbound) only.

For sendmail 8.8.6, HP-UX B.11.00
If UNOF_INET_29772_3.depot or previous is installed, remove it using swremove(1M). Then install:
PHNE_34900 or subsequent
Note: PHNE_34900 or subsequent upgrades sendmail 8.8.6 to sendmail 8.9.3.

The HP advisory is available at:

http://www2.itrc.hp.com/service/cki/docDisplay.do?docId=c00629555

Vendor URL:  www.sendmail.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (HP/UX)
Underlying OS Comments:  HP-UX B.11.00, B.11.04, B.11.11, B.11.23

Message History:   This archive entry is a follow-up to the message listed below.
Mar 22 2006 Sendmail Race Condition in Signal Handler May Let Remote Users Trigger a Buffer Overflow to Execute Arbitrary Code



 Source Message Contents

Subject:  HPSBUX02108 SSRT061133 rev.1 - HP-UX Sendmail, Remote Execution




-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

HPSBUX02108 SSRT061133 rev.1 - HP-UX running Sendmail, Remote
Execution 
of Arbitrary Code

NOTICE: The information in this Security Bulletin should be acted
upon as soon
 as possible.

Release Date: 2006-03-25
Last Updated: 2006-03-25

Potential Security Impact: Remote Execution of Arbitrary Code
Source: Hewlett-Packard Company,
HP Software Security Response Team

VULNERABILITY SUMMARY A vulnerability has been identified in Sendmail
which may allow a remote attacker to execute arbitrary code.

References: CVE-2006-0058

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.11, B.11.23.

BACKGROUND For a PGP signed version of this security bulletin please
write 
to: security-alert@hp.com

CERT has published a vulnerability report available at:
http://www.kb.cert.org/vuls/id/834865
This bulletin will be revised as other versions of Sendmail become
available.
To determine if an HP-UX system has an affected version, search the
output of 
"swlist -a revision -l fileset" for one of the filesets listed below.
 For affected 
systems verify that the recommended action has been taken.

AFFECTED VERSIONS

For sendmail 8.13.3

HP-UX B.11.11
 ==========
SMAIL-UPGRADE.INETSVCS-SMAIL, revision B.11.11.02.001
action: install updates from ftp server

HP-UX B.11.23
 ==========
SMAIL-UPGRADE.INET-SMAIL, revision B.11.23.1.001
action: install updates from ftp server

END AFFECTED VERSIONS


RESOLUTION
HP has made the following software updates available to resolve the
 issue. The software updates can be downloaded via ftp from:

System: hprc.external.hp.com (192.170.19.100)
Login: sendmail
Password: sendmail (NOTE: CASE-sensitive)

ftp://sendmail:sendmail@hprc.external.hp.com/
or
ftp://sendmail:sendmail@192.170.19.100/

The README.txt contains cksum and md5 output for the preliminary 
depots.

cksum ./sendmail-8.13_1123.depot
2652638131 15759360 ./sendmail-8.13_1123.depot

md5 ./sendmail-8.13_1123.depot
E541BD19D7943CCCB5A67E3E1A9A2289

cksum sendmail-8.13_1111.depot
4281196762 5130240 sendmail-8.13_1111.depot

md5 ./sendmail-8.13_1111.depot
0582E81206BD54E98E754628C0D8478C

After installation, the output of "sendmail -bs" will include the
following
 information.

sendmail -bs versioning: @(#)Sendmail version 8.13.3 - 
Revision 2.002_Beta - 2006/03/25


MANUAL ACTIONS: Yes - Update
HP-UX B.11.11 - install preliminary software updates from ftp server 
HP-UX B.11.23 - install preliminary software updates from ftp server


PRODUCT SPECIFIC INFORMATION
HP-UX Security Patch Check: Security Patch Check revision B.02.00 
analyzes all HP-issued Security Bulletins to provide a subset of
recommended 
actions that potentially affect a specific HP-UX system.
For more information:
http://software.hp.com/portal/swdepot/displayProductInfo.do?productNum
ber=B6834AA

HISTORY:
Version: 1 (rev.1) 25 March 2006 Initial release

Support: For further information, contact normal HP Services support
channel.

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 get the security-alert PGP key, please send an e-mail message as
follows:
To: security-alert@hp.com
Subject: get key

Subscribe: To initiate a subscription to receive future HP Security
Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&langcod
e=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC

On the web page: ITRC security bulletins and patch sign-up Under
Step1: your ITRC security bulletins and patches
 - check ALL categories for which alerts are required and continue.
Under Step2: your ITRC operating systems
 - verify your operating system selections are checked 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.

To review previously published Security Bulletins visit:
http://www.itrc.hp.com/service/cki/secBullArchive.do

(c)Copyright 2006 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; l
ost 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.

-----BEGIN PGP SIGNATURE-----
Version: PGP 8.1

iQA/AwUBRCYF2eAfOvwtKn1ZEQIrdgCg53gCwL8ABB07tOFYKzvV2aSQZ8kAn27N
3l3nCp3Li2Rebne2yAEBj9Mj
=/APM
-----END PGP SIGNATURE-----

 
 


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