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Category:   Application (Generic)  >   setrlimit Vendors:   HPE
(HP Issues Fix for Additional OS Versions) HP/UX setrlimit Resource Limiting Utility Lets Local Users Cause Denial of Service Conditions and Possibly Execute Arbitrary Code on the Server with Root Level Privileges
SecurityTracker Alert ID:  1002512
SecurityTracker URL:  http://securitytracker.com/id/1002512
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Oct 9 2001
Impact:   Denial of service via local system, Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): HP9000 Series 700/800 running HP-UX releases 10.01, 10.10, 10.20, 10.24, 10.26, 11.04, and 11.00 only.
Description:   HP announced a vulnerability in the setrlimit() function that allows local users to cause denial of service conditions and may allow local users to execute arbitrary code on the server with root level privileges.

HP reported that if a local user sets the core file size limit to 0 for a process that has set user id or set group id privileges, that process could create corefiles or be attached to with a debugger. This may allow a local user to execute arbitrary code with the setuid or setgid privileges of the process. The vulnerability is reportedly due to a flaw that causes incorrect core processing when a process with its core file size limit set to 0 by setrlimit() aborts.

Impact:   A local user can cause denial of service conditions and may be able to execute arbitrary code on the server with root level privileges.
Solution:   The vendor has added patches for OS version 10.26 to the list of previously available patches:

11.11 PHKL_23423,
11.04 PHKL_23886,
11.00 PHKL_23628,
10.20 700 PHKL_22701,
10.20 800 PHKL_22702,
10.24 700 PHKL_24249,
10.24 800 PHKL_24250,
10.26 700 PHKL_25243,
10.26 800 PHKL_25244,
10.10 700 PHKL_23477,
10.10 800 PHKL_23478,
10.01 700 PHKL_23512,
10.01 800 PHKL_23513.

Vendor URL:  www.hp.com/ (Links to External Site)
Cause:   Exception handling error
Underlying OS:  UNIX (HP/UX)

Message History:   This archive entry is a follow-up to the message listed below.
Jul 2 2001 HP/UX setrlimit Resource Limiting Utility Lets Local Users Cause Denial of Service Conditions and Possibly Execute Arbitrary Code on the Server with Root Level Privileges



 Source Message Contents

Subject:  security bulletins digest



                        HP Support Information Digests

===============================================================================
o  IT Resource Center World Wide Web Service
   ---------------------------------------------------

   If you subscribed through the IT Resource Center and would
   like to be REMOVED from this mailing list, access the
   IT Resource Center on the World Wide Web at:

     http://www.itresourcecenter.hp.com/

   Login using your IT Resource Center User ID and Password.
   Then select Support Information Digests (located under
   Maintenance and Support).  You may then unsubscribe from the
   appropriate digest.
===============================================================================


Digest Name:  daily security bulletins digest
    Created:  Tue Oct  9  3:00:03 PDT 2001

Table of Contents:

Document ID      Title
---------------  -----------
HPSBUX0107-156_  Sec. Vulnerability in setrlimit(1M) (rev. 1)

The documents are listed below.
-------------------------------------------------------------------------------


Document ID:  HPSBUX0107-156_
Date Loaded:  20011008
      Title:  Sec. Vulnerability in setrlimit(1M) (rev. 1)

---------------------------------------------------------------
    HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0156,
    Originally issued 2 July '01
    Last changed: 08 October '01
 ---------------------------------------------------------------

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:  The setrlimit() allows incorrect core files

** Rev.1 **
PLATFORM: HP9000 Series 700/800 running HP-UX releases 10.01, 10.10,
---->>>>  10.20, 10.24, 10.26, 11.04, and 11.00 only.

DAMAGE:   Possible denial of service

SOLUTION: Install the appropriate patch for the HP-UX release:
** Rev.1 **
             11.11                          PHKL_23423,
             11.04                          PHKL_23886,
             11.00                          PHKL_23628,
             10.20 700                      PHKL_22701,
             10.20 800                      PHKL_22702,
             10.24 700                      PHKL_24249,
             10.24 800                      PHKL_24250,
 ---->>>>    10.26 700                      PHKL_25243,
 ---->>>>    10.26 800                      PHKL_25244,
             10.10 700                      PHKL_23477,
             10.10 800                      PHKL_23478,
             10.01 700                      PHKL_23512,
             10.01 800                      PHKL_23513.

MANUAL ACTIONS: None

AVAILABILITY:   The patches are available now.

CHANGE SUMMARY: Updated patch information.
 ---------------------------------------------------------------
 A. Background
    Hewlett-Packard has discovered that a process that at one time was
    setuid/setgid could create corefiles or be attached to with a
    debugger.  If the process core file's size limit has been set to 0
    in setrlimit(), when the process aborts, the core processing is
    incorrect.

 B. Recommended solution
    After applying this patch, the kernel now remembers that the
    process was at one time setuid/setgid, and disallow corefiles
    and debugger attachment.  If the process core file size limit
    has been set to zero, it obeys.

    Application of the appropriate patch selected from the list below
    completely solves this problem.

** Rev.1 **
    For HP-UX release:
           11.11                          PHKL_23423,
           11.04                          PHKL_23886,
           11.00                          PHKL_23628,
           10.20 700                      PHKL_22701,
           10.20 800                      PHKL_22702,
           10.24 700                      PHKL_24249,
           10.24 800                      PHKL_24250,
 ---->>>>  10.26 700                      PHKL_25243,
 ---->>>>  10.26 800                      PHKL_25244,
           10.10 700                      PHKL_23477,
           10.10 800                      PHKL_23478,
           10.01 700                      PHKL_23512,
           10.01 800                      PHKL_23513.

    Note: Many of these patches have dependencies.  A reboot will
          be required.

 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.

    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.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix

    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".


 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.

    Permission is granted for copying and circulating this
    Bulletin to Hewlett-Packard (HP) customers (or the Internet
    community) for the purpose of alerting them to problems,
    if and only if, the Bulletin is not edited or changed in
    any way, is attributed to HP, and provided such reproduction
    and/or distribution is performed for non-commercial purposes.

    Any other use of this information is prohibited. HP is not
    liable for any misuse of this information by any third party.
 _______________________________________________________________
-----End of Document ID:  HPSBUX0107-156_-------------------------------------


 
 


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