Caldera Security Advisory: buffer overflow in fetchmail

Date: Tue, 26 Jun 2001 11:29:29 -0600
From: Support Info <supinfo@caldera.com>
Subject: Security Update: [CSSA-2001-022.1] buffer overflow in fetchmail

                   Caldera International, Inc.  Security Advisory

Subject:                buffer overflow in fetchmail
Advisory number:        CSSA-2001-022.1
Issue date:             2001 June, 22
Cross reference:        CSSA-2001-022.0

1. Problem Description

   In previous versions of fetchmail, there were buffer overflows 
   when handling mail messages with very long header fields.

   This hole could theoretically be exploited remotely by sending
   messages with such headers.

2. Vulnerable Versions

   System                       Package
   -----------------------------------------------------------
   OpenLinux 2.3                All packages previous to
                                fetchmail-5.0.4-1

   OpenLinux eServer 2.3.1      All packages previous to
   and OpenLinux eBuilder       fetchmail-5.0.4-1

   OpenLinux eDesktop 2.4       All packages previous to
                                fetchmail-5.2.0-2

   OpenLinux 3.1 Server         All packages previous to
                                fetchmail-5.4.0-5a      

   OpenLinux 3.1 Workstation    All packages previous to
                                fetchmail-5.4.0-5a

3. Solution

   Workaround

      none

   The proper solution is to upgrade to the latest packages.

4. OpenLinux 2.3

   4.1 Location of Fixed Packages

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

       ftp://ftp.caldera.com/pub/updates/OpenLinux/2.3/current/RPMS/

       The corresponding source code package can be found at:

       ftp://ftp.caldera.com/pub/updates/OpenLinux/2.3/current/SRPMS
   
   4.2 Verification

       62bbe7566a6eea7df05542c41f8024a9  RPMS/fetchmail-5.0.4-1.i386.rpm
       05f3db8ec0bb7178d123af4e9761eee5  SRPMS/fetchmail-5.0.4-1.src.rpm

   4.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

          rpm -Fhv fetchmail*.i386.rpm

5. OpenLinux eServer 2.3.1 and OpenLinux eBuilder for ECential 3.0

   5.1 Location of Fixed Packages

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

       ftp://ftp.caldera.com/pub/updates/eServer/2.3/current/RPMS/

       The corresponding source code package can be found at:

       ftp://ftp.caldera.com/pub/updates/eServer/2.3/current/SRPMS

   5.2 Verification

       bf8ed2912bdd5a0c6f5e5d50db552c29  RPMS/fetchmail-5.0.4-1.i386.rpm
       05f3db8ec0bb7178d123af4e9761eee5  SRPMS/fetchmail-5.0.4-1.src.rpm

   5.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

          rpm -Fvh fetchmail*i386.rpm

6. OpenLinux eDesktop 2.4

   6.1 Location of Fixed Packages

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

       ftp://ftp.caldera.com/pub/updates/eDesktop/2.4/current/RPMS/

       The corresponding source code package can be found at:

       ftp://ftp.caldera.com/pub/updates/eDesktop/2.4/current/SRPMS

   6.2 Verification

       2d278844840df47146795ae11e638493  RPMS/fetchmail-5.2.0-2.i386.rpm
       85c4c3f805db47041681665f8beb3986  SRPMS/fetchmail-5.2.0-2.src.rpm

   6.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

           rpm -Fvh fetchmail*i386.rpm

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

       d869c5bdc83bd5bd28624def44fde168  RPMS/fetchmail-5.4.0-5a.i386.rpm
       6ee33ac553e4e68e8193bf3c858d1411  RPMS/fetchmailconf-5.4.0-5a.i386.rpm
       f93919dc140aad6f1b4e6c256d1c81e0  SRPMS/fetchmail-5.4.0-5a.src.rpm

   7.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

           rpm -Fvh fetchmail*i386.rpm

       or start kcupdate, the Caldera OpenLinux Update Manager 

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

       d869c5bdc83bd5bd28624def44fde168  RPMS/fetchmail-5.4.0-5a.i386.rpm
       6ee33ac553e4e68e8193bf3c858d1411  RPMS/fetchmailconf-5.4.0-5a.i386.rpm
       f93919dc140aad6f1b4e6c256d1c81e0  SRPMS/fetchmail-5.4.0-5a.src.rpm

   8.3 Installing Fixed Packages

       Upgrade the affected packages with the following commands:

           rpm -Fvh fetchmail*i386.rpm

       or start kcupdate, the Caldera OpenLinux Update Manager 

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 10115.

10.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.