Redhat: Kerberos vulnerabilities
Posted by LinuxSecurity.com Team   
RedHat Linux Denial of service and buffer overflow vulnerabilities present.

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                   Red Hat, Inc. Security Advisory

Synopsis:          Updated Kerberos 5 packages are now available for Red Hat Linux.
Advisory ID:       RHSA-2000:025-05
Issue date:        2000-05-16
Updated on:        2000-05-17
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.

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.Red Hat.com/bugzilla for more info):

10653 - 'stat' unresolved on "libkrb5.so.2.2" load

6. RPMs required:

Red Hat Linux 6.2:

intel:              
ftp://ftp.Red Hat.com/6.2/i386/krb5-configs-1.1.1-15.i386.rpm 
ftp://ftp.Red Hat.com/6.2/i386/krb5-devel-1.1.1-15.i386.rpm 
ftp://ftp.Red Hat.com/6.2/i386/krb5-libs-1.1.1-15.i386.rpm 
ftp://ftp.Red Hat.com/6.2/i386/krb5-server-1.1.1-15.i386.rpm 
ftp://ftp.Red Hat.com/6.2/i386/krb5-workstation-1.1.1-15.i386.rpm

alpha: 
ftp://ftp.Red Hat.com/6.2/alpha/krb5-configs-1.1.1-15.alpha.rpm 
ftp://ftp.Red Hat.com/6.2/alpha/krb5-devel-1.1.1-15.alpha.rpm 
ftp://ftp.Red Hat.com/6.2/alpha/krb5-libs-1.1.1-15.alpha.rpm 
ftp://ftp.Red Hat.com/6.2/alpha/krb5-server-1.1.1-15.alpha.rpm 
ftp://ftp.Red Hat.com/6.2/alpha/krb5-workstation-1.1.1-15.alpha.rpm

sparc: 
ftp://ftp.Red Hat.com/6.2/sparc/krb5-configs-1.1.1-15.sparc.rpm 
ftp://ftp.Red Hat.com/6.2/sparc/krb5-devel-1.1.1-15.sparc.rpm 
ftp://ftp.Red Hat.com/6.2/sparc/krb5-libs-1.1.1-15.sparc.rpm 
ftp://ftp.Red Hat.com/6.2/sparc/krb5-server-1.1.1-15.sparc.rpm 
ftp://ftp.Red Hat.com/6.2/sparc/krb5-workstation-1.1.1-15.sparc.rpm

7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
3fd11d622ba3cc897673a6ab6aef4541  6.2/alpha/krb5-configs-1.1.1-15.alpha.rpm
8a8096d690384617fcdcf6e0a8aba8ff  6.2/alpha/krb5-devel-1.1.1-15.alpha.rpm
5cbe85b8045f1980e50f2029d12316f4  6.2/alpha/krb5-libs-1.1.1-15.alpha.rpm
7686c92345d450203536bc025fd0b571  6.2/alpha/krb5-server-1.1.1-15.alpha.rpm
39acce6c4f96d96a3a0fb17297c20ed8  6.2/alpha/krb5-workstation-1.1.1-15.alpha.rpm
ab4dac8b93f48de033d9b8c35200c756  6.2/i386/krb5-configs-1.1.1-15.i386.rpm
c44572eebb30735cbfb0543ae00c1428  6.2/i386/krb5-devel-1.1.1-15.i386.rpm
f87a05040e7d170f10c2a18eb7a82e95  6.2/i386/krb5-libs-1.1.1-15.i386.rpm
b08b7910f325d25aa2ff18db635609bc  6.2/i386/krb5-server-1.1.1-15.i386.rpm
644b7de0d1a50894ea9e03d7e00ed828  6.2/i386/krb5-workstation-1.1.1-15.i386.rpm
28ceddb2f09d1f122f757d5229dc0dd7  6.2/sparc/krb5-configs-1.1.1-15.sparc.rpm
cc6a1fea9cd63afb2c19f20fcf43b503  6.2/sparc/krb5-devel-1.1.1-15.sparc.rpm
c3fbb341a6768a2fa9403e4ae2cce9a1  6.2/sparc/krb5-libs-1.1.1-15.sparc.rpm
2846852ed38dbd190d6bad3226fa8e53  6.2/sparc/krb5-server-1.1.1-15.sparc.rpm
3abbadd05e525df39805f5b4789e25e9  6.2/sparc/krb5-workstation-1.1.1-15.sparc.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

8. References:

N/A