Vulnerability Note VU#895609
MIT Kerberos krb4-enabled KDC contains multiple vulnerabilities
Vulnerabilities in the MIT Kerberos Key Distribution Center server could allow a remote attacker to compromise the key database, gain access to sensitive information, or cause a denial of service.
Several vulnerabilities exist in the Authentication Service and Key Distribution Center server (krb5kdc) included in the MIT krb5 Kerberos implementation. In one case, the use of a null or dangling pointer in the KDC can result in a crash or double-free, and may leak portions of process memory to an attacker. In another case, uninitialized stack values cause reuse of a small window of previous stack values to be interpreted as message content. Some of this content may be returned to the attacker as part of an error response.
These vulnerabilities are only exposed if Kerberos 4 support is enabled. MIT notes that by default, Kerberos 4 support is compiled in but not enabled in recent versions of the software. MIT also notes that no other client or application server programs are affected.
An unauthenticated remote attacker may cause a krb4-enabled KDC server to crash, expose information (potentially including secret key data), or execute arbitrary code with the privileges of the krb5kdc. Secondary impacts include compromise of the Kerberos key database and denial of service to clients attempting to authenticate in the affected Kerberos realm.
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Systems Affected (Learn More)
|Vendor||Status||Date Notified||Date Updated|
|Apple Computer, Inc.||Affected||06 Mar 2008||18 Mar 2008|
|MIT Kerberos Development Team||Affected||06 Mar 2008||18 Mar 2008|
|Ubuntu||Affected||06 Mar 2008||19 Mar 2008|
|Cisco Systems, Inc.||Not Affected||06 Mar 2008||10 Mar 2008|
|Computer Associates||Not Affected||06 Mar 2008||18 Mar 2008|
|Force10 Networks, Inc.||Not Affected||06 Mar 2008||22 Jul 2011|
|Intel Corporation||Not Affected||06 Mar 2008||10 Mar 2008|
|Intoto||Not Affected||06 Mar 2008||10 Mar 2008|
|Juniper Networks, Inc.||Not Affected||06 Mar 2008||03 Apr 2008|
|Microsoft Corporation||Not Affected||06 Mar 2008||03 Apr 2008|
|Secure Computing Network Security Division||Not Affected||06 Mar 2008||10 Mar 2008|
|Sun Microsystems, Inc.||Not Affected||06 Mar 2008||18 Mar 2008|
|TippingPoint, Technologies, Inc.||Not Affected||06 Mar 2008||18 Mar 2008|
|3com, Inc.||Unknown||06 Mar 2008||06 Mar 2008|
|Alcatel||Unknown||06 Mar 2008||06 Mar 2008|
CVSS Metrics (Learn More)
Thanks to Ken Raeburn of the MIT Kerberos Team for reporting this vulnerability.
This document was written by Chad R Dougherty.
- CVE IDs: CVE-2008-0062 CVE-2008-0063
- Date Public: 18 Mar 2008
- Date First Published: 18 Mar 2008
- Date Last Updated: 22 Jul 2011
- Severity Metric: 10.10
- Document Revision: 13
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