Caldera Security Advisory: sendmail instant root exploit

Date: Fri, 24 Aug 2001 13:57:21 -0600
From: Caldera Support Info <supinfo@caldera.com>
Subject: Security Update [CSSA-2001-032.0] Linux - sendmail instant root
        exploit


____________________________________________________________________________
                   Caldera International, Inc.  Security Advisory

Subject:                Linux - sendmail instant root exploit
Advisory number:        CSSA-2001-032.0
Issue date:             2001, August 24
Cross reference:
____________________________________________________________________________


1. Problem Description

   Sendmail contains an input validation error, so local users may be
   able to write arbitrary data to process memory, possibly allowing the
   execution of code/commands with elevated privileges. This allows
   a local attacker to gain access to the root account.


2. Vulnerable Versions

   System                       Package
   -----------------------------------------------------------
   OpenLinux 2.3                 not vulnerable                
   
   OpenLinux eServer 2.3.1       not vulnerable                
   and OpenLinux eBuilder                                      
   
   OpenLinux eDesktop 2.4        not vulnerable                
   
   OpenLinux Server 3.1          All packages previous to      
                                 sendmail-8.11.1-4             
   
   OpenLinux Workstation 3.1     All packages previous to      
                                 sendmail-8.11.1-4             
   
3. Solution

   Workaround

     none

   The proper solution is to upgrade to the latest packages.

4. OpenLinux 2.3

    not vulnerable

5. OpenLinux eServer 2.3.1 and OpenLinux eBuilder for ECential 3.0

    not vulnerable

6. OpenLinux eDesktop 2.4

    not vulnerable

7. OpenLinux 3.1 Server

    7.1 Location of Fixed Packages

       The upgrade packages can be found on Caldera's FTP site at:

       ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/RPMS

       The corresponding source code package can be found at:

       ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/SRPMS

   7.2 Verification

       b4fda9679325022adda547f1b3fae8dc  RPMS/sendmail-8.11.1-4.i386.rpm
       f3eaef00ae6a7cb30635baf6ad13325a  RPMS/sendmail-cf-8.11.1-4.i386.rpm
       1f17f7fa698748eb5bc6e55951948451  RPMS/sendmail-doc-8.11.1-4.i386.rpm
       c3f6af83c406174b325aa28af45c51ae  SRPMS/sendmail-8.11.1-4.src.rpm
       

   7.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

         rpm -Fvh sendmail-8.11.1-4.i386.rpm/ 
              sendmail-cf-8.11.1-4.i386.rpm/ 
              sendmail-doc-8.11.1-4.i386.rpm/
         

8. OpenLinux 3.1 Workstation

    8.1 Location of Fixed Packages

       The upgrade packages can be found on Caldera's FTP site at:

       ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/RPMS

       The corresponding source code package can be found at:

       ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/SRPMS

   8.2 Verification

       b4fda9679325022adda547f1b3fae8dc  RPMS/sendmail-8.11.1-4.i386.rpm
       f3eaef00ae6a7cb30635baf6ad13325a  RPMS/sendmail-cf-8.11.1-4.i386.rpm
       1f17f7fa698748eb5bc6e55951948451  RPMS/sendmail-doc-8.11.1-4.i386.rpm
       c3f6af83c406174b325aa28af45c51ae  SRPMS/sendmail-8.11.1-4.src.rpm
       

   8.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

         rpm -Fvh sendmail-8.11.1-4.i386.rpm 
              sendmail-cf-8.11.1-4.i386.rpm 
              sendmail-doc-8.11.1-4.i386.rpm
         
9. References

   This and other Caldera security resources are located at:

   http://www.caldera.com/support/security/index.html

   This security fix closes Caldera's internal Problem Report 10420.


10. Acknowledgements
   
   Caldera International wishes to thank Cade Cairns of SecurityFocus for
   spotting and reporting this bug.

11. Disclaimer

   Caldera International, Inc. is not responsible for the misuse of
   any of the information we provide on this website and/or through our
   security advisories. Our advisories are a service to our customers
   intended to promote secure installation and use of Caldera OpenLinux.
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