Date: Thu, 15 Jun 2000 19:00 -0400
From: bugzilla@redhat.com
To: redhat-watch-list@redhat.com, linux-security@redhat.com
Subject: [RHSA-2000:025-12] Updated Kerberos 5 packages are now
available for Red Hat Linux.
Red Hat, Inc. Security Advisory
Synopsis: Updated Kerberos 5 packages are now available for Red Hat Linux.
Advisory ID: RHSA-2000:025-12
Issue date: 2000-05-16
Updated on: 2000-06-15
Product: Red Hat Linux
Keywords: N/A
Cross references: N/A
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.
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://ftp.redhat.com/redhat/updates/6.2/i386/krb5-configs-1.1.1-21.i386.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/i386/krb5-devel-1.1.1-21.i386.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/i386/krb5-libs-1.1.1-21.i386.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/i386/krb5-server-1.1.1-21.i386.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/i386/krb5-workstation-1.1.1-21.i386.rpm
alpha:
ftp://ftp.redhat.com/redhat/updates/6.2/alpha/krb5-configs-1.1.1-21.alpha.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/alpha/krb5-devel-1.1.1-21.alpha.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/alpha/krb5-libs-1.1.1-21.alpha.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/alpha/krb5-server-1.1.1-21.alpha.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/alpha/krb5-workstation-1.1.1-21.alpha.rpm
sparc:
ftp://ftp.redhat.com/redhat/updates/6.2/sparc/krb5-configs-1.1.1-21.sparc.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/sparc/krb5-devel-1.1.1-21.sparc.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/sparc/krb5-libs-1.1.1-21.sparc.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/sparc/krb5-server-1.1.1-21.sparc.rpm
ftp://ftp.redhat.com/redhat/updates/6.2/sparc/krb5-workstation-1.1.1-21.sparc.rpm
sources:
ftp://ftp.redhat.com/redhat/updates/6.2/SRPMS/krb5-1.1.1-21.src.rpm
7. Verification:
MD5 sum Package Name
220dd8648e6560215475f29f12cf7fbf 6.2/SRPMS/krb5-1.1.1-21.src.rpm 506aa4887dbb63ee0fdf1b0617db5d92 6.2/alpha/krb5-configs-1.1.1-21.alpha.rpm 19d3648a64b259a3a83ef70ecf3c1d3e 6.2/alpha/krb5-devel-1.1.1-21.alpha.rpm ea30e1a247aa7d4c516ead13c825c8cb 6.2/alpha/krb5-libs-1.1.1-21.alpha.rpm 55805f5199f7c2c24c03f4609a2cbd81 6.2/alpha/krb5-server-1.1.1-21.alpha.rpm a98473df43eedf564efe9a05b30c2baf 6.2/alpha/krb5-workstation-1.1.1-21.alpha.rpm 43d0af74bb628d446dc8781e9d0ae08b 6.2/i386/krb5-configs-1.1.1-21.i386.rpm d13ac3cc0e680b0e452aeb34749ea7b4 6.2/i386/krb5-devel-1.1.1-21.i386.rpm 76882356337e55cd3bd5e0d5cfa454de 6.2/i386/krb5-libs-1.1.1-21.i386.rpm 93efde6cc79b16245f5e27e793a8a4ad 6.2/i386/krb5-server-1.1.1-21.i386.rpm aa00aa8b26a50b75317f51e447a17420 6.2/i386/krb5-workstation-1.1.1-21.i386.rpm ff7f959f22e80e9aeabb3a1c6602e225 6.2/sparc/krb5-configs-1.1.1-21.sparc.rpm 1cce9df9c5591fe43c1340334d01d6be 6.2/sparc/krb5-devel-1.1.1-21.sparc.rpm cc67fdfad917452f383e45a9945e5ae0 6.2/sparc/krb5-libs-1.1.1-21.sparc.rpm 0215d914b0d9e2f78830ef7df9b14fea 6.2/sparc/krb5-server-1.1.1-21.sparc.rpm 3f564e722e61c1e4e8bd1a3faa108b3d 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
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:
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.