SSRT3531 Potential Security Vulnerability in sendmail (rev.8)
From: Security Alert (secure_at_cup.hp.com)
Date: 08/19/03
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Date: 19 Aug 2003 06:30:28 -0700
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**REVISED 08**
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0304-253
Originally issued: 03 April 2003
Last revised: 18 August 2003
SSRT3531 Potential Security Vulnerability in sendmail (rev.8)
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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.
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PROBLEM: Potential security vulnerability in sendmail
IMPACT: Potential unauthorized Privileged Access,
Potential Denial of Service (DoS).
PLATFORM: HP 9000 Series 700/800 Servers running HP-UX B.10.10,
B.10.20, B.11.00, B.11.04(VVOS), B.11.11, and B.11.22.
**REVISED 08**
SOLUTION: B.10.10 - write to security-alert@hp.com for information
B.10.20 - install PHNE_28760
B.11.00 (sendmail-8.9.3) - install PHNE_28809
B.11.00 (sendmail-8.11.1) - install web upgrade
--> B.11.04 - install PHNE_29526
B.11.11 (sendmail-8.9.3) - install PHNE_28810
B.11.11 (sendmail-8.11.1) - install web upgrade
B.11.22 - install PHNE_28409
MANUAL ACTIONS: Yes - NonUpdate
B.10.10:
write to security-alert@hp.com for information
All versions:
Modify /etc/mail/sendmail.cf
AVAILABILITY: Fixes are available for B.10.10, B.10.20, B.11.00,
B.11.04(VVOS), B.11.11, and B.11.22.
CHANGE SUMMARY: Rev.01 - Added fix for B.11.22.
Added HPSecurityBul253.depot.
Rev.02 - Corrected filename:
/usr/newconfig/etc/mail/sendmail.cf
Added sendmail.886.10.10.r1.
Rev.03 - New HPSecurityBul253.depot containing
sendmail.886.10.10.r1.
Rev.04 - Added early release patches for B.11.00
and B.11.11.
Rev.05 - Added pre-release sendmail-8.11.1 web
upgrades for B.11.00 and B.11.11.
Rev.06 - Added pre-release sendmail-8.11.1 patch
for B.11.22.
Added pre-release sendmail-8.9.3 patch
for B.10.20.
PHNE_26304 and PHNE_28761 for sendmail
8.9.3 contain the wrong man pages.
Changed to uniform revision notation
(e.g. 11.00 -> B.11.00) to match the
"uname -a" output.
Rev.07 - Added PHNE_28760
for B.10.20 sendmail-8.9.3.
Added PHNE_28809
for B.11.00 sendmail-8.9.3.
Added web upgrades for
sendmail-8.11.1 B.11.00 and B.11.11.
Added PHNE_28409 for B.11.22
Added PHNE_28810 for B.11.11.
Added AFFECTED VERSIONS section.
Rev.08 - Added PHNE_29526
for B.11.04 sendmail-8.9.3.
Temporary ftp site for 10.10 removed.
Modified 8.11.1 web upgrade information.
Added url for sendmail-8.11.1 upgrade.
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A. Background
A potential security vulnerability with sendmail has been
reported in HP-UX. This potential vulnerability may result
in unauthorized Privileged Access or a Denial of Service
(DoS). This potential vulnerability may be exploited
remotely.
This is the vulnerability reported in CERT/CC CA-2003-12.
Note: This problem also affects:
HP Tru64 UNIX/TruCluster Server V4.x and V5.x
HP Tru64 UNIX Engineering continues to work this
issue at the highest priority.
As solution information becomes available HP
will provide notice of the availability of any
necessary patches through standard security
bulletin announcements and be available from your
normal HP Services support channel.
The HP Tru64 bulletin will be posted to the customer
support website within 24 hours of release to -
http://thenew.hp.com/country/us/eng/support.html
or www.hp.com
Use the SEARCH IN feature box, enter SSRT in the
search window or use a specific SSRT #
(example: SSRT3531)
HP ProLiant Servers
If running Open Source Sendmail, refer to the following
Sendmail Consortium URL for patch details or upgrades:
http://www.sendmail.org
As more information becomes available HP
will provide notice of the availability of any
necessary patches through standard security
bulletin announcements and be available from your
normal HP Services support channel.
NOT VULNERABLE:
HP NonStop Servers
HP OpenVMS.
AFFECTED VERSIONS
The following is a list by HP-UX revision of
affected filesets and the fileset revision or
patch containing the fix. 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
a fixed revision or the applicable patch is
installed.
HP-UX B.11.22
=============
InternetSrvcs.INETSVCS2-RUN
InternetSrvcs.INETSVCS-RUN
fix: PHNE_28409 or subsequent
Modify /etc/mail/sendmail.cf
**REVISED 08**
HP-UX B.11.11
=============
SMAIL-811.INETSVCS-SMAIL
--> fix: B.11.11.01.005 or subsequent
--> (web upgrade to Sendmail 8.11.1 Version 5
--> or subsequent)
Modify /etc/mail/sendmail.cf
InternetSrvcs.INETSVCS-RUN
fix: PHNE_28810 or subsequent
Modify /etc/mail/sendmail.cf
HP-UX B.11.04
=============
InternetSrvcs.INETSVCS-RUN
--> fix: PHNE_29526 or subsequent
HP-UX B.11.00
=============
SMAIL-811.INETSVCS-SMAIL
--> fix: B.11.00.01.004 or subsequent
--> (web upgrade to Sendmail 8.11.1 Version 4
--> or subsequent)
Modify /etc/mail/sendmail.cf
InternetSrvcs.INETSVCS-RUN
fix: PHNE_28809 or subsequent
Modify /etc/mail/sendmail.cf
HP-UX B.10.20
=============
InternetSrvcs.INETSVCS-RUN
fix: PHNE_28760 or subsequent
Modify /etc/mail/sendmail.cf
**REVISED 08**
HP-UX B.10.10
=============
InternetSrvcs.INETSVCS-RUN
--> fix: write to security-alert@hp.com for information
END AFFECTED VERSIONS
B. Recommended solution
Modify /etc/mail/sendmail.cf as follows:
Add "restrictqrun" to the PrivacyOptions.
After the change the line should read:
O PrivacyOptions=authwarnings,restrictqrun
Then install the patch or upgrade.
Determine the sendmail version:
Login in as root:
cd /usr/sbin
sendmail -d0.1 < /dev/null | grep -i version
The display will show Version #.#.#
Install the fix for that version as described below.
HP-UX B.11.22 sendmail 8.11.1
PHNE_28409 is now available.
**REVISED 08**
HP-UX B.11.00 and B.11.11 sendmail 8.11.1
--> A web upgrade is available from software.hp.com:
<http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
cgi/displayProductInfo.pl?productNumber=SMAIL811>
HP-UX B.11.11 sendmail 8.9.3
PHNE_28810 is now available.
-->HP-UX B.11.04 sendmail 8.9.3
--> PHNE_29526 is now available.
HP-UX B.11.00 sendmail 8.9.3
PHNE_28809 is now available.
HP-UX B.10.20 sendmail 8.9.3
PHNE_28760 is now available.
-->For B.10.10 write to security-alert@hp.com for information.
Note: If you receive either of the following messages after
applying the fix, please follow the recommended action.
warning: /etc/mail/aliases has world read or
write permission. This is unsafe.
warning: /etc/mail/aliases.db has world read or
write permission. This is unsafe.
Recommended action
Execute the following commands.
chmod 640 /etc/mail/aliases
chmod 640 /etc/mail/aliases.db
sendmail -bi
C. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP IT Resource Center via electronic
mail, do the following:
Use your browser to get to the HP IT Resource Center page
at:
Use the 'Login' tab at the left side of the screen to login
using your ID and password. Use your existing login or the
"Register" button at the left to create a login, in order to
gain access to many areas of the ITRC. Remember to save the
User ID assigned to you, and your password.
In the left most frame select "Maintenance and Support".
Under the "Notifications" section (near the bottom of
the page), select "Support Information Digests".
To -subscribe- to future HP Security Bulletins or other
Technical Digests, click the check box (in the left column)
for the appropriate digest and then click the "Update
Subscriptions" button at the bottom of the page.
or
To -review- bulletins already released, select the link
(in the middle column) for the appropriate digest.
NOTE: Using your itrc account security bulletins can be
found here:
http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin
To -gain access- to the Security Patch Matrix, select
the link for "The Security Bulletins Archive". (near the
bottom of the page) Once in the archive the third link is
to the current Security Patch Matrix. Updated daily, this
matrix categorizes security patches by platform/OS release,
and by bulletin topic. Security Patch Check completely
automates the process of reviewing the patch matrix for
11.XX systems.
For information on the Security Patch Check tool, see:
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=B6834AA
The security patch matrix is also available via anonymous
ftp:
ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/
On the "Support Information Digest Main" page:
click on the "HP Security Bulletin Archive".
The PGP key used to sign this bulletin is available from
several PGP Public Key servers. The key identification
information is:
2D2A7D59
HP Security Response Team (Security Bulletin signing only)
<security-alert@hp.com>
Fingerprint =
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D. To report new security vulnerabilities, send email to
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Please encrypt any exploit information using the
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(c)Copyright 2003 Hewlett-Packard Company
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 HP products referenced
herein are trademarks and/or service marks of Hewlett-Packard
Company. Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.
_________________________________________________________________
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-- Yours truly, HP S/W Security Team WTEC Cupertino, California Return-Path: secure@cup.hp.com Reply-to: security-alert@hp.com
- Next message: Frank Cusack: "Re: Stack growth direction to thwart buffer overflow attacks"
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