Bug 162255 - CAN-2005-1175 krb5 buffer overflow in KDC
CAN-2005-1175 krb5 buffer overflow in KDC
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: krb5 (Show other bugs)
3.0
All Linux
medium Severity medium
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Assigned To: Nalin Dahyabhai
Brian Brock
impact=moderate,embargo=20050712,sour...
: Security
Depends On:
Blocks:
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Reported: 2005-07-01 14:26 EDT by Josh Bressers
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

See Also:
Fixed In Version: RHSA-2005-562
Doc Type: Bug Fix
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Last Closed: 2005-07-12 14:19:04 EDT
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RHEL 7.3 requirements from Atomic Host:


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Description Josh Bressers 2005-07-01 14:26:28 EDT
+++ This bug was initially created as a clone of Bug #157103 +++

Additionally, the same request, when received by the KDC via either
TCP or UDP, can trigger a bug in the krb5 library which results in a
single-byte overflow of a heap buffer.  Additionally, application
servers are vulnerable to a highly improbable attack, provided that
the attacker controls a realm sharing a cross-realm key with the
target realm. [CAN-2005-1175]

An unauthenticated attacker may be able to use this vulnerability
to execute arbitrary code on the KDC host, potentially compromising an
entire Kerberos realm.  No exploit code is known to exist at this
time.  Exploitation of these vulnerabilities is believed to be
difficult.
Comment 1 Josh Bressers 2005-07-01 14:27:43 EDT
This issue also affects RHEL2.1
Comment 2 Josh Bressers 2005-07-07 08:58:08 EDT
According to MIT, the attacker must control a realm sharing a cross-realm key
with the target realm.  I'm lowering the severity to "moderate".
Comment 3 Mark J. Cox (Product Security) 2005-07-12 14:00:53 EDT
Public at http://web.mit.edu/kerberos/www/advisories/, removing embargo
Comment 4 Red Hat Bugzilla 2005-07-12 14:19:05 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-562.html

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