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___________________________________________________________________________

                        TurboLinux Security Announcement


        Vulnerable Packages: All versions prior to glibc-2.1.3-27
        Date: 02/14/2001 5:00 PDT

        Affected TurboLinux versions:TL 6.1 WorkStation,
                                     All TurboLinux versions
                                     6.0.5 and earlier

        TurboLinux Advisory ID#:  TLSA2000021-2

   Credits: This vulnerability was announced by RedHat in an advisory
            posted on BugTraq on January 16, 2001.
___________________________________________________________________________

A security hole was discovered in the package mentioned above.
Please update the package in your installation as soon as possible.
___________________________________________________________________________

1. Problem Summary(From the BugTraq advisory at securityfocus.com, id#2223)

   A problem with the library could allow access to write or overwrite
   restricted files.

2. Impact(Also from the BugTraq advisory on securityfocus.com)

   Upon execution of SUID and SGID applications, the library allows a user
   to preload libraries in the environment variable LD_PRELOAD providing
   the variable does not contain forward slashes.  A special check is also
   performed to ensure the library being preloaded is SUID.  However, if the
   library is found in the /etc/ld.so.cache file, this check is circumvented,
   and never performed.  It is therefore possible to load a library from /lib
   or /usr/lib prior to the execution of a SUID or SGID program.  This flaw
   makes it possible for a user with malicious motives to create files in re-
   stricted locations, or overwrite files outside of the access of this user,
   including system files.

3. Solution

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

  rpm -Uvh --nodeps --force ftp_path_to_filename

  Where ftp_path_to_filename is the following:

  ftp://ftp.turbolinux.com/pub/updates/6.0/security/glibc-2.1.3-27.i386.rpm
  glibc-devel-2.1.3-27.i386.rpm
  glibc-profile-2.1.3-27.i386.rpm

  The source RPM can be downloaded here:

  ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/glibc-2.1.3-27.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
---------------------------------------------------------------------------
13afe999cdcc5133aca98fc0a59c4340       glibc-2.1.3-27.i386.rpm
4a55428c154311387844fbf84600e789       glibc-devel-2.1.3-27.i386.rpm
6b48d26d9dc0ce224e4ea9c7a56fcc92       glibc-profile-2.1.3-27.i386.rpm
e0cd7ac0cca7a8e870247235e4f2e4cd       glibc-2.1.3-27.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:

 rpm --checksig --nogpg 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 TL6.0 Workstation
   and Server security updates
   ftp://ftp.turbolinux.com/pub/updates/4.0/security/ for TL4.0 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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