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ESB-2003.0706 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0309-281 -- SSRT3631 Potential Security Vulnerability in sendmail (Revised) |
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Date: 08 October 2003 Original URL: http://www.auscert.org.au/render.html?cid=1&it=3513 References: ESB-2003.0694 Click here for PGP verifiable version -----BEGIN PGP SIGNED MESSAGE-----
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AUSCERT External Security Bulletin Redistribution
ESB-2003.0706 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0309-281
SSRT3631 Potential Security Vulnerability in sendmail (Revised)
08 October 2003
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AusCERT Security Bulletin Summary
---------------------------------
Product: sendmail
Publisher: Hewlett-Packard
Operating System: HP-UX B.11.22
HP-UX B.11.11
HP-UX B.11.04
HP-UX B.11.00
Impact: Root Compromise
Access Required: Remote
Ref: ESB-2003.0694
AL-2003.17
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**REVISED 02**
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0309-281
Originally issued: 21 September 2003
Last revised: 06 October 2003
SSRT3631 Potential Security Vulnerability in sendmail
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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.
PLATFORM: HP-UX releases B.11.00, B.11.04 (VVOS), B.11.11, B.11.22
SOLUTION: Download and install the appropriate sendmail file.
MANUAL ACTIONS: Yes - NonUpdate
Download and install the appropriate
sendmail file.
AVAILABILITY: The files are available from the ftp site described
below.
CHANGE SUMMARY: Rev.01 - Added fix for CAN-2003-0681.
Rev.02 - sendmail.811.11.22.r5 replaces
sendmail.811.11.22.r4.
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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.
This is the vulnerability reported in CERT/CC CA-2003-25:
<http://www.cert.org/advisories/CA-2003-25.html>
New versions are available which also contain the fix for
the problem reported here:
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0681>
**REVISED 02**
--> NOTE: The previous 11.22 sendmail file failed to work
--> properly. It has been replaced by
--> sendmail.811.11.22.r5.
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: install sendmail.811.11.22.r5 file
HP-UX B.11.11
=============
SMAIL-811.INETSVCS-SMAIL
fix: install sendmail.811.11.11.r4 file
InternetSrvcs.INETSVCS-RUN
fix: install sendmail.893.11.11.r4 file
HP-UX B.11.04
=============
InternetSrvcs.INETSVCS-RUN
fix: install sendmail.893.11.00.r4 file
HP-UX B.11.00
=============
SMAIL-811.INETSVCS-SMAIL
fix: install sendmail.811.11.00.r4 file
InternetSrvcs.INETSVCS-RUN
fix: install sendmail.893.11.00.r4 file
END AFFECTED VERSIONS
B. Recommended solution
System: hprc.external.hp.com (192.170.19.51)
Login: sendmail
Password: sendmail
FTP Access: ftp://sendmail:sendmail@hprc.external.hp.com/
or: ftp://sendmail:sendmail@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
==================================================
To fix the problem:
1. Install the patches recommended in HPSBUX0304-253.
2. Determine the sendmail version.
3. Download and install the appropriate sendmail file.
Details:
1. HPSBUX0304-253 must be implemented before proceeding.
2. Determine the sendmail version.
Login in as root:
cd /usr/sbin
sendmail -d0.1 < /dev/null | grep -i version
The display will show Version #.#.#
3. Download and install the appropriate file.
a. Download the appropriate file(s).
**REVISED 02**
For HP-UX 11.00: sendmail.811.11.00.r4.gz for 8.11.1
sendmail.893.11.00.r4.gz for 8.9.3
For HP-UX 11.04: sendmail.893.11.00.r4.gz for 8.9.3
For HP-UX 11.11: sendmail.811.11.11.r4.gz for 8.11.1
sendmail.893.11.11.r4.gz for 8.9.3
--> For HP-UX 11.22: sendmail.811.11.22.r5.gz for 8.11.1
b. Unpack the file with gunzip(1)
c. Verify the cksum or the md5 sum.
cksum:
496737019 831488 sendmail.893.11.00.r4
772697028 974848 sendmail.811.11.00.r4
2187106120 864256 sendmail_893.11.11.r4
3209418086 1019904 sendmail.811.11.11.r4
--> 1442591041 2312500 sendmail.811.11.22.r5
MD5 (sendmail.893.11.00.r4) =
cb5dd8680d77ecd8b26050582de0f45d
MD5 (sendmail.811.11.00.r4) =
01d738201b0735f77b1c9888e99a2df1
MD5 (sendmail_893.11.11.r4) =
4f2f0530f8a2b0316d02de75d6e569d1
MD5 (sendmail.811.11.11.r4) =
35570fcd2c60e2a208ac633840ac9fc2
--> MD5 (sendmail.811.11.22.r5) =
--> fcbd1ea962c2214acca4b7b3a31d793d
Note: If you wish to verify the md5 sum and you do not
have a copy of md5, please refer to:
HPSBUX9408-016
Patch sums and the MD5 program
Note: Using your itrc account security bulletins can be
found here:
http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin
d. Install the appropriate file as follows:
Copy the appropriate sendmail file to a protected directory
such as /usr/sbin. If you are running sendmail 8.9.3 also
copy the appropriate killsm file to a protected directory
such as /usr/sbin.
Login as root and run killsm:
killsm
Verify the sendmail daemon is not running:
ps -ef | grep sendmail
Make a backup copy of the existing sendmail:
cd /usr/sbin
cp sendmail sendmail.original
Note the permissions for reference:
ls -lia /usr/sbin/sendmail
Install the new sendmail:
cp sendmail.xxx.yy.zz.rn sendmail
For example, on 11.11:
cp sendmail.811.11.11.r4 sendmail
Restart sendmail.
If you were running sendmail before the killsm
command above, you can now restart it with the
following command (for HP-UX, not VVOS):
/sbin/init.d/sendmail start
Note: Do not execute the command above for VVOS 11.04
The command runs sendmail as a daemon, which is
not supported by VVOS (Virtual Vault Operating
System).
==================================================
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:
http://itrc.hp.com
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 =
6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59
If you have problems locating the key please write to
security-alert@hp.com. Please note that this key is
for signing bulletins only and is not the key returned
by sending 'get key' to security-alert@hp.com.
D. To report new security vulnerabilities, send email to
security-alert@hp.com
Please encrypt any exploit information using the
security-alert PGP key, available from your local key
server, or by sending a message with a -subject- (not body)
of 'get key' (no quotes) to security-alert@hp.com.
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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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