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TLSA2001028 gnupg-1.0.6-1
From: TurboLinux Security Team <security () www turbolinux com>
Date: Thu, 21 Jun 2001 11:51:05 -0700 (PDT)

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___________________________________________________________________________

                     Turbolinux Security Announcement

        Package: gnupg
        Vulnerable Packages: All Turbolinux versions previous to 1.0.6-1
        Date: 06/21/2001 5:00 PDT

        Affected Turbolinux platforms:  TL 6.5 Server,
                                        TL 6.1 Workstation,
                                        All Turbolinux versions
                                        6.0.5 and earlier

        Turbolinux Advisory ID#:  TLSA2001028

   References: http://www.i.cz/en/onas/tisk4.html

http://linuxtoday.com/news_story.php3?ltsn=2001-05-30-015-20-SC-PD

___________________________________________________________________________

Security holes have been discovered in the package gnupg, the GPG encryp-
tion program.  Please update this package in your installation as soon as 
possible.
___________________________________________________________________________

1. Problem Summary

   a. Format String Vulnerability
   
        An indirect invocation of the function vfprintf() does not pass
      the argument "%s" as the first argument.  This allows for a filename
      to use format strings and may allow a user with malicious intent to
      invoke shell commands with the current user's privileges.

   b. Private Key Retrieval Vulnerability

        It has been determined that there are insufficient measures taken in
      protecting a user's secret key.  If an attacker has write access to a
      user's private key file, and is able to capture a message that is signed
      with that private key, he will be able to decipher the user's private
      key.  Note that this is done even without knowledge of the user's se-
      cret passphrase.
  
2. Solution

  Update the package from our ftp server by running the following command:

  rpm -Uvh ftp_path_to_filename

  Where ftp_path_to_filename is the following:

ftp://ftp.turbolinux.com/pub/updates/6.0/security/gnupg-1.0.6-1.i386.rpm

  The source RPM can be downloaded here:

ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/gnupg-1.0.6-1.src.rpm

  **Note: You must rebuild and install the RPM if you choose to download
  and install the SRPM.  Simply installing the SRPM alone WILL NOT CLOSE
  THE SECURITY HOLE.

 Please verify the MD5 checksums of the updates before you install:

  MD5 sum                               Package Name
___________________________________________________________________________

  a336358f776e0dbbb9f495693386a193     gnupg-1.0.6-1.i386.rpm
  bb873783b676249cbf22a09b5bc56f4d     gnupg-1.0.6-1.src.rpm
___________________________________________________________________________

These packages are GPG signed by Turbolinux for security. Our key
is available here:

 http://www.turbolinux.com/security/tlgpgkey.asc

To verify a package, use the following command:

 rpm --checksig name_of_rpm

To examine only the md5sum, use the following command:

 md5sum name_of_rpm

**Note: Checking GPG keys requires RPM 3.0 or higher.

___________________________________________________________________________

You can find more updates on our ftp server:

   ftp://ftp.turbolinux.com/pub/updates/6.0/security/ 
   for TL6.x Workstation and Server security updates
  
Our webpage for security announcements:

   http://www.turbolinux.com/security

If you want to report vulnerabilities, please contact:

   security () turbolinux com
___________________________________________________________________________

Subscribe to the Turbolinux Security Mailing lists:

  TL-security - A moderated list for discussing security issues
                Turbolinux products.
  Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security

  TL-security-announce - An announce-only mailing list for security
                         updates and alerts.

  Subscribe at:

      http://www.turbolinux.com/mailman/listinfo/tl-security-announce

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