AusCERT - ESB-2003.0862 -- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX0309-28 -- Potential security vulnerability in sendmail

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ESB-2003.0862 -- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX0309-28 -- Potential security vulnerability in sendmail
Date: 18 December 2003
References: ESB-2004.0142 ESB-2003.0833

Click here for printable version
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===========================================================================
             AUSCERT External Security Bulletin Redistribution

     ESB-2003.0862 -- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX0309-28
               Potential security vulnerability in sendmail
                             18 December 2003

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                sendmail
Publisher:              Hewlett-Packard
Operating System:       HP-UX 11.23
                        HP-UX 11.22
                        HP-UX 11.11
                        HP-UX 11.04 (VVOS)
                        HP-UX 11.00
Impact:                 Root Compromise
Access Required:        Remote
CVE Names:              CAN-2003-0694 CAN-2003-0681

Ref:                    AL-2003.17
                        ESB-2003.0833

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Hash: SHA1

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**REVISED 07**
 Source: HEWLETT-PACKARD COMPANY
 SECURITY BULLETIN: HPSBUX0309-281
 Originally issued: 21 September 2003
 Last revised: 16 December 2003
 SSRT3631 Rev.7 sendmail
 -----------------------------------------------------------------

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: 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, B.11.23

SOLUTION:
          B.11.00 - Sendmail 8.9.3 - PHNE_29773
          B.11.00 - Sendmail 8.11.1 - B.11.00.01.005
          B.11.04 - HPSecurityBul281b.depot
          B.11.11 - Sendmail 8.9.3 - PHNE_29774
          B.11.11 - Sendmail 8.11.1 - B.11.11.01.006
 -->      B.11.22 - Sendmail 8.11.1 - PHNE_29912
 -->      B.11.23 - Sendmail 8.11.1 - PHNE_29913

MANUAL ACTIONS: Yes - NonUpdate
                All revisions - modify /etc/mail/sendmail.cf
                          as described below and in
                          HPSBUX0304-253.
                B.11.00 - Sendmail 8.11.1 - Update to
                          B.11.00.01.005
                B.11.11 - Sendmail 8.11.1 - Update to
                          B.11.11.01.006
                B.11.04 - Download and install
                          HPSecurityBul281b.depot.

AVAILABILITY: HPSecurityBul281b.depot is available from the
              ftp site described below.  The patches and
              web upgrades are available from itrc.hp.com.

CHANGE SUMMARY: Rev.01 - Added CAN-2003-0681.
                Rev.02 - sendmail.811.11.22.r5 replaces
                         sendmail.811.11.22.r4.
                Rev.03 - HPSecurityBul281.depot available.
                Rev.04 - HPSecurityBul281a.depot available.
                Rev.05 - HPSecurityBul281b.depot adds B.11.23
                         and corrects B.11.22.
                Rev.06 - Added PHNE_29773 and PHNE_29774.
                         Added Sendmail 8.11.1 B.11.00.01.005.
                         Added Sendmail 8.11.1 B.11.11.01.006.
                Rev.07 - Added PHNE_29912 and PHNE_29913.
 -----------------------------------------------------------------
 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 address the
    the issue reported here:

    <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0681>

**REVISED 07**
     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.11.23
     =============
     InternetSrvcs.INETSVCS2-RUN
     InternetSrvcs.INETSVCS-RUN
 --> fix: install PHNE_29913 or subsequent
          modify /etc/mail/sendmail.cf


     HP-UX B.11.22
     =============
     InternetSrvcs.INETSVCS2-RUN
     InternetSrvcs.INETSVCS-RUN
 --> fix: install PHNE_29912 or subsequent
          modify /etc/mail/sendmail.cf

     HP-UX B.11.11
     =============
     SMAIL-811.INETSVCS-SMAIL
     fix: install revision B.11.11.01.006 or subsequent
          modify /etc/mail/sendmail.cf

     InternetSrvcs.INETSVCS-RUN
     fix: install PHNE_29774 or subsequent
          modify /etc/mail/sendmail.cf

     HP-UX B.11.04
     =============
     InternetSrvcs.INETSVCS-RUN
     fix: install HPSecurityBul281b.depot
          modify /etc/mail/sendmail.cf

     HP-UX B.11.00
     =============
     SMAIL-811.INETSVCS-SMAIL
     fix: install revision B.11.00.01.005 or subsequent
          modify /etc/mail/sendmail.cf

     InternetSrvcs.INETSVCS-RUN
     fix: install PHNE_29773 or subsequent
          modify /etc/mail/sendmail.cf

     END AFFECTED VERSIONS

 B. Recommended solution
**REVISED 07**

     All versions:
     =============
     If the following changes to /etc/mail/sendmail.cf were
     not done when HPSBUX0304-253 was implemented they should
     be done now:

      Modify /etc/mail/sendmail.cf as follows:

       Add "restrictqrun" to the PrivacyOptions.
       After the change the line should read:

         O PrivacyOptions=authwarnings,restrictqrun

     Patches and web upgrades are now available for
 --> B.11.00, B.11.11, B.11.22, and B.11.23.
     HPSecurityBul281b should be removed before installing
     the patch or web upgrade:

        swremove HPSecurityBul281b.INETSVCS-RUN

    B.11.00:
        Sendmail 8.9.3 - install PHNE_29773 or subsequent.
        Sendmail 8.11.1 - install the web upgrade B.11.00.01.005
                           or subsequent.

    B.11.11
        Sendmail 8.9.3 - install PHNE_29774 or subsequent.
        Sendmail 8.11.1 - install the web upgrade B.11.11.01.006
                           or subsequent.

 -->B.11.22:
 -->    Sendmail 8.11.1 - install PHNE_29912 or subsequent.

 -->B.11.23:
 -->    Sendmail 8.11.1 - install PHNE_29913 or subsequent.

    B.11.04:

    1. Install the patches recommended in HPSBUX0304-253.
    2. Download and install HPSecurityBul281b.depot

        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

    File: HPSecurityBul281b.depot.gz


 -->Details (B.11.04 only):

    1. HPSBUX0304-253
          MUST
       be implemented before proceeding.

    2. Download and install HPSecurityBul281b.depot.gz:
       a. Download HPSecurityBul281b.depot.gz

       b. Unpack the file with gunzip(1)

       c. Verify the cksum or the md5 sum.

         cksum:
         17704519 8601600 HPSecurityBul281b.depot

         md5:
         MD5 (HPSecurityBul281b.depot) =
                5dfbc286756bc8eba44c4ecce67a1422

       d. Extract the "readme" file for further information:
            cd directory_containing_depot
            swlist -d -l product -a readme
                   @ $PWD/HPSecurityBul281b.depot

       e. Install HPSecurityBul281b.depot with swinstall(1).


    ==================================================


    Note: If you receive either of the following messages after
    applying the updates, 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
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    In the left most frame select "Maintenance and Support".

    Under the "Notifications" section (near the bottom of
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    To -subscribe- to future HP Security Bulletins or other
    Technical Digests, click the check box (in the left column)
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    or

    To -review- bulletins already released, select the link
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    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.

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

(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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