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[TL-Security-Announce] glibc unsetenv and locale TLSA2000020-1
From: Kevin Beyer <kbeyer () TURBOLINUX COM>
Date: Fri, 8 Sep 2000 19:09:05 -0700


                        TurboLinux Security Announcement

        Package: glibc-2.1.2-17 and earlier
        Date: Friday September 08 17:08 PDT 2000

        Affected TurboLinux versions: 6.0.5 and earlier
        TurboLinux Advisory ID#:  TLSA2000021-1


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

1. Problem Summary

   There have been two major security vulnerabilities involving glibc, one 
   involving ld.so and unsetenv that allows local user's to gain root privileges 
   due to environment variables not getting cleared out in some circumstances. 
   Another vulnerability is lack of good checking on the locale file specification 
   which can be set to a file provided by an attacker to crash an application and gain 
   root access.
   The locale problem is fully described in GNATS PR 1883

2. Impact

   These problems provide means for local users gain root privilege on a

3. Solution

  Update the packages 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:

  for 6.0.4 and up (glibc-2.1.2-17):

  for 6.0 - 6.0.2 (glibc-2.1.2-15):

  The source RPMs can be downloaded here:

  for 6.0.4 and up (glibc-2.1.2-17):

  for 6.0 - 6.0.2 (glibc-2.1.2-15):

  **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

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

  MD5 sum                               Package Name
b7824d1a9fd2dd461e8db5ca286fecd8  glibc-2.1.2-17S.i386.rpm
47e4b40362904acec32ecfad4f978220  glibc-devel-2.1.2-17S.i386.rpm
7ae48c7c2bfea04fb0d22fb18120a8c4  glibc-profile-2.1.2-17S.i386.rpm
dae857e8b766af7eaa480087e93a23d2  mtrace-2.1.2-17S.i386.rpm
290d00e78815af51d3ea11a2cdfc4e89  nscd-2.1.2-17S.i386.rpm

426205df03b60cd650f34daefb885bfa  glibc-2.1.2-17S.src.rpm

dae46d04e3b62937ddcf946c5e993774  glibc-2.1.2-15S.i386.rpm
a5b7ef165c034ed5783c1095460d67e8  glibc-devel-2.1.2-15S.i386.rpm
19cd445efeb1b25df373dff12b31e2dc  glibc-profile-2.1.2-15S.i386.rpm
ee45c2f4dde606f93eaede6320b12928  mtrace-2.1.2-15S.i386.rpm
a4830dc4f79a34fade2f59a8b8254416  nscd-2.1.2-15S.i386.rpm

42b08f78579f664b1d56f1246742a8a1  glibc-2.1.2-15S.src.rpm

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


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:


If you want to report vulnerabilities, please contact:

   rt-security () turbolinux com

Subscribe to the TurboLinux Security Mailing lists:

  TL-security - A moderated list for discussing security issues in TurboLinux
  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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