RedHat 6.x: Vulnerability with openldap
Posted by LinuxSecurity.com Team   
RedHat Linux Local users can destroy the contents of any file on any mounted filesystem.
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                   Red Hat, Inc. Security Advisory

Synopsis:          New openldap packages.
Advisory ID:       RHSA-2000:012-05
Issue date:        2000-04-13
Updated on:        2000-04-21
Product:           Red Hat Linux
Keywords:          openldap startup symlink overwrite denial
Cross references:  N/A
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1. Topic:

New openldap packages are available which fix a security
vulnerability in Red Hat Linux 6.1 and 6.2.

2. Relevant releases/architectures:

Red Hat Linux 6.1 - i386 alpha sparc
Red Hat Linux 6.2 - i386 alpha sparc


3. Problem description:

OpenLDAP follows symbolic links when creating files.  The default location for
these files is /usr/tmp, which is a symlink to /tmp, which in turn is a
world-writable directory.  Local users can destroy the contents of any file on any
mounted filesystem.

4. Solution:

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where filename is the name of the RPM.

Administrators with existing databases should also move their NEXTID and *.dbb
files from /usr/tmp to /var/lib/ldap, and verify that the 'directory' setting in
/etc/openldap/slapd.conf is changed accordingly.

5. Bug IDs fixed (http://bugzilla.Red Hat.com/bugzilla for more info):

10714 - Insecure file creation using static files which follow symlinks.


6. Obsoleted by:

N/A

7. Conflicts with:

N/A

8. RPMs required:


Red Hat Linux 6.1:

intel:
ftp://updates.Red Hat.com/6.1/i386/openldap-1.2.9-6.i386.rpm

alpha:
ftp://updates.Red Hat.com/6.1/alpha/openldap-1.2.9-6.alpha.rpm

sparc:
ftp://updates.Red Hat.com/6.1/sparc/openldap-1.2.9-6.sparc.rpm

sources:
ftp://updates.Red Hat.com/6.1/SRPMS/openldap-1.2.9-6.src.rpm

Red Hat Linux 6.2:

intel:
ftp://updates.Red Hat.com/6.2/i386/openldap-1.2.9-6.i386.rpm

alpha:
ftp://updates.Red Hat.com/6.2/alpha/openldap-1.2.9-6.alpha.rpm

sparc:
ftp://updates.Red Hat.com/6.2/sparc/openldap-1.2.9-6.sparc.rpm

sources:
ftp://updates.Red Hat.com/6.2/SRPMS/openldap-1.2.9-6.src.rpm


9. Verification:

MD5 sum                           Package Name
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fa79c61565a72407db4695ef8468a482  6.1/alpha/openldap-1.2.9-6.alpha.rpm
058c4aa63710da7490f98da4b3cad53d  6.1/i386/openldap-1.2.9-6.i386.rpm
17fbdb33172a7884f56b4fc746b1b763  6.1/SRPMS/openldap-1.2.9-6.src.rpm
816fccd85990833f7c5dfb7f2dc6e0a1  6.1/sparc/openldap-1.2.9-6.sparc.rpm
fa79c61565a72407db4695ef8468a482  6.2/alpha/openldap-1.2.9-6.alpha.rpm
816fccd85990833f7c5dfb7f2dc6e0a1  6.2/sparc/openldap-1.2.9-6.sparc.rpm
17fbdb33172a7884f56b4fc746b1b763  6.2/SRPMS/openldap-1.2.9-6.src.rpm
058c4aa63710da7490f98da4b3cad53d  6.2/i386/openldap-1.2.9-6.i386.rpm


These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:
    http://www.Red Hat.com/corp/contact.html

You can verify each package with the following command:
    rpm --checksig  

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    rpm --checksig --nogpg 

10. References:

Thanks also go to Stan Bubrouski for reporting this problem.

Cristian
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Cristian Gafton     --     gafton@Red Hat.com      --     Red Hat, Inc.
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  "How could this be a problem in a country where we have Intel and 
   Microsoft?"  --Al Gore on Y2K

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