linux security - Jun 2000 - [RHSA-2000:025-13] Updated Kerberos 5 packages are now available for Red Hat Linux.

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                   Red Hat, Inc. Security Advisory

Synopsis:          Updated Kerberos 5 packages are now available for Red Hat
Linux.
Advisory ID:       RHSA-2000:025-13
Issue date:        2000-05-16
Updated on:        2000-06-16
Product:           Red Hat Linux
Keywords:          N/A
Cross references:  N/A
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1. Topic:

Security vulnerabilities have been found in the Kerberos 5 implementation
shipped with Red Hat Linux 6.2.

2. Relevant releases/architectures:

Red Hat Linux 6.2 - i386 alpha sparc

3. Problem description:

A number of possible buffer overruns were found in libraries included
in the affected packages.  A denial-of-service vulnerability was also found
in the ksu program.

* A remote user may gain unauthorized root access to a machine running
  services authenticated with Kerberos 4.

* A remote user may gain unauthorized root access to a machine running
  krshd, regardless of whether the program is configured to accept
  Kerberos 4 authentication.

* A local user may gain unauthorized root access by exploiting v4rcp
  or ksu.

* A remote user can cause a KDC to become unresponsive or crash by sending
  it an improperly formatted request.

* A remote user may execute certain FTP commands without authorization
  on systems using the FTP server included in the krb5-workstation
  package.

* An attacker with access to a local account may gain unauthorized
  root access on systems using the FTP server included in the
  krb5-workstation package.

The prior errata announcement for these package contained incorrect md5sum
values.  The correct md5sums are listed below.

4. Solution:

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where filename is the name of the RPM.

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

10653 - ''stat'' unresolved on "libkrb5.so.2.2" load
11496 - security-updated krb5 packages fail dependencies


6. RPMs required:

Red Hat Linux 6.2:

intel:
ftp://updates.redhat.com/6.2/i386/krb5-configs-1.1.1-21.i386.rpm
ftp://updates.redhat.com/6.2/i386/krb5-devel-1.1.1-21.i386.rpm
ftp://updates.redhat.com/6.2/i386/krb5-libs-1.1.1-21.i386.rpm
ftp://updates.redhat.com/6.2/i386/krb5-server-1.1.1-21.i386.rpm
ftp://updates.redhat.com/6.2/i386/krb5-workstation-1.1.1-21.i386.rpm

alpha:
ftp://updates.redhat.com/6.2/alpha/krb5-configs-1.1.1-21.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/krb5-devel-1.1.1-21.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/krb5-libs-1.1.1-21.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/krb5-server-1.1.1-21.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/krb5-workstation-1.1.1-21.alpha.rpm

sparc:
ftp://updates.redhat.com/6.2/sparc/krb5-configs-1.1.1-21.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/krb5-devel-1.1.1-21.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/krb5-libs-1.1.1-21.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/krb5-server-1.1.1-21.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/krb5-workstation-1.1.1-21.sparc.rpm

sources:
ftp://updates.redhat.com/6.2/SRPMS/krb5-1.1.1-21.src.rpm

7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
f181b2037de905e80288e387b60f4e52  6.2/SRPMS/krb5-1.1.1-21.src.rpm
f561bcf39652922fe17c0f8f9d657a92  6.2/alpha/krb5-configs-1.1.1-21.alpha.rpm
182af71accb3ed83e8c3775b52474ea1  6.2/alpha/krb5-devel-1.1.1-21.alpha.rpm
ea27afca5259f61dc990859a68c08efc  6.2/alpha/krb5-libs-1.1.1-21.alpha.rpm
12cd0badc97753ede1ab24741e8b127a  6.2/alpha/krb5-server-1.1.1-21.alpha.rpm
583ca4a6755bdc4a248eaa5fe5a37418  6.2/alpha/krb5-workstation-1.1.1-21.alpha.rpm
3616f4ca518aebf7a6aba1fe9a8858fe  6.2/i386/krb5-configs-1.1.1-21.i386.rpm
d61dbe28620c5ff5fc8f6f87802875c4  6.2/i386/krb5-devel-1.1.1-21.i386.rpm
df9cca2508bc2a7bcfabb75ead5ec176  6.2/i386/krb5-libs-1.1.1-21.i386.rpm
a43f18ed47e8b59142c37460f9202b25  6.2/i386/krb5-server-1.1.1-21.i386.rpm
0fe3ee19148e92ac7b5d7a04f14168d0  6.2/i386/krb5-workstation-1.1.1-21.i386.rpm
b31276f906d284cbfc3afb03b7373ddb  6.2/sparc/krb5-configs-1.1.1-21.sparc.rpm
c29e9f755f42ca1c3112d8ebb4dc65df  6.2/sparc/krb5-devel-1.1.1-21.sparc.rpm
cd7af0e48f5144fa9020319e88ca8db4  6.2/sparc/krb5-libs-1.1.1-21.sparc.rpm
e4155d32ad39fd1989a60e8ff3d2562d  6.2/sparc/krb5-server-1.1.1-21.sparc.rpm
cbecb34317007c04480e258c3cf859bb  6.2/sparc/krb5-workstation-1.1.1-21.sparc.rpm

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

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

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 <filename>

8. References:

http://www.securityfocus.com/bid/1220
http://www.securityfocus.com/bid/1338
http://web.mit.edu/kerberos/www/advisories/index.html

Thanks to Chris Evans, Mike Friedman, Jim Paris, Matt Power, Andrew
Newman, Christopher R. Thompson, and Marcus Watts for reporting these
problems to us and the Kerberos 5 team.