MIT Kerberos 5 kadmind buffer overflow vulnerability

Overview

An unspecified vulnerability in MIT Kerberos kadmind server may allow an attacker to execute arbitrary code.

Description

Kerberos is a network authentication system that uses a trusted third party to authenticate clients and servers to each other. It is designed to provide strong authentication for client/server applications by using secret-key cryptography. MIT Kerberos code is used in network applications from a variety of different vendors and is included in many UNIX and Linux distributions. The kadmind daemon is the administration server that runs on the master Kerberos server.

From the kadmind manual page:

This command starts the KADM5 administration server. The administration server runs on the master Kerberos server, which stores the KDC principal database and the KADM5 policy database. Kadmind accepts remote requests to administer the information–exclude in these databases. Remote requests are sent, for example, by kadmin(8) and the kpasswd(1) command, both of which are clients of kadmind.
Per MITKRB5-SA-2007-006 there is a stack buffer overflow in the RPCSEC_GSS authentication in the RPC library that is included in krb5-1.4 through krb5-1.6.2. Any programs that link against the RPC library may also be affected.

Note that per MITKRB5-SA-2007-006, versions of kerberos prior to krb5-1.5 are not affected.

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Impact

A remote, unauthenticated attacker may be able to execute arbitrary code.

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Solution

Update
The Kerberos team has released an update to address this issue. Please see MITKRB5-SA-2007-006 for more information on obtaining fixed software.

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Restrict access

Restricng network access to the Kerberos server may partially mitigate this vulnerability. kadmind listens on 749/tcp by default.

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Vendor Information

883632

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Debian GNU/Linux __ Affected

Notified: August 24, 2007 Updated: September 05, 2007

Status

Affected

Vendor Statement

The Debian project has corrected the buffer overflow in the RPC library alias CVE-2007-3999 in the Kerberos packages in its security advisory DSA 1367.

The oldstable distribution (sarge) is not affected by this problem.

For the stable distribution (etch) this problem has been fixed in version 1.4.4-7etch3.

For the unstable distribution (sid) this problem has been fixed in version 1.6.dfsg.1-7.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Gentoo Linux __ Affected

Notified: August 24, 2007 Updated: October 26, 2007

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See <http://www.gentoo.org/security/en/glsa/glsa-200709-01.xml&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23883632 Feedback>).

MIT Kerberos Development Team __ Affected

Notified: August 23, 2007 Updated: September 04, 2007

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See <http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-006.txt&gt; for more details.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23883632 Feedback>).

Red Hat, Inc. __ Affected

Notified: August 24, 2007 Updated: September 06, 2007

Status

Affected

Vendor Statement

This issue did not affect the version of Kerberos as distributed with Red Hat Enterprise Linux 2.1, 3, or 4.

For Red Hat Enterprise Linux 5 users we made the following update available for Kerberos to correct this issue

<https://rhn.redhat.com/errata/RHSA-2007-0858.html&gt;

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

SUSE Linux __ Affected

Notified: August 24, 2007 Updated: September 06, 2007

Status

Affected

Vendor Statement

SUSE and openSUSE packages were affected by this vulnerabilities and update packages are released.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sun Microsystems, Inc. __ Affected

Notified: August 24, 2007 Updated: September 06, 2007

Status

Affected

Vendor Statement

Sun can confirm that Solaris 8, 9, and 10 are affected by the issue described in CERT advisory VU#883632.

Sun has published Sun Alert 103060 which includes details of the Solaris specific impact, contributing factors, workaround options and resolution information, and is available here:

<http://sunsolve.sun.com/search/document.do?assetkey=1-26-103060-1&gt;

The Sun Alert will be kept up to date regarding progress on this issue.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Microsoft Corporation Not Affected

Notified: August 24, 2007 Updated: September 04, 2007

Status

Not Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Apple Computer, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

AttachmateWRQ, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Conectiva Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Cray Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

CyberSafe, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

EMC Corporation Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Engarde Secure Linux Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

F5 Networks, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fedora Project Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

FreeBSD, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fujitsu Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hewlett-Packard Company Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hitachi Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation (zseries) Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM eServer Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Immunix Communications, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ingrian Networks, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Juniper Networks, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

KTH Kerberos Team Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Mandriva, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

MontaVista Software, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NEC Corporation Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NetBSD Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Novell, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

OpenBSD Unknown

Notified: September 04, 2007 Updated: September 04, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Openwall GNU/*/Linux Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

QNX, Software Systems, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Silicon Graphics, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Slackware Linux Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sony Corporation Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

The SCO Group Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Trustix Secure Linux Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Turbolinux Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ubuntu Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Unisys Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Wind River Systems, Inc. Unknown

Notified: August 24, 2007 Updated: August 24, 2007

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

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CVSS Metrics

Group	Score	Vector
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Temporal
Environmental

References

• <http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-006.txt&gt;
• <http://secunia.com/advisories/26676/&gt;
• <http://docs.info.apple.com/article.html?artnum=307041&gt;

Acknowledgements

Thanks to the MIT Kerberos team for information that was used in this report.

This document was written by Ryan Giobbi.

Other Information

CVE IDs:	CVE-2007-3999
Severity Metric:	8.61 Date Public: