[gentoo-announce] [ GLSA 200904-09 ] MIT Kerberos 5: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200904-09

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http://security.gentoo.org/

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Severity: High

Title: MIT Kerberos 5: Multiple vulnerabilities

Date: April 08, 2009

Bugs: #262736, #263398

ID: 200904-09

 

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Synopsis

========

 

Multiple vulnerabilites in MIT Kerberos 5 might allow remote

unauthenticated users to execute arbitrary code with root privileges.

 

Background

==========

 

MIT Kerberos 5 is a suite of applications that implement the Kerberos

network protocol. kadmind is the MIT Kerberos 5 administration daemon,

KDC is the Key Distribution Center.

 

Affected packages

=================

 

-------------------------------------------------------------------

Package / Vulnerable / Unaffected

-------------------------------------------------------------------

1 app-crypt/mit-krb5 < 1.6.3-r6 >= 1.6.3-r6

 

Description

===========

 

Multiple vulnerabilities have been reported in MIT Kerberos 5:

 

* A free() call on an uninitialized pointer in the ASN.1 decoder when

decoding an invalid encoding (CVE-2009-0846).

 

* A buffer overread in the SPNEGO GSS-API application, reported by

Apple Product Security (CVE-2009-0844).

 

* A NULL pointer dereference in the SPNEGO GSS-API application,

reported by Richard Evans (CVE-2009-0845).

 

* An incorrect length check inside an ASN.1 decoder leading to

spurious malloc() failures (CVE-2009-0847).

 

Impact

======

 

A remote unauthenticated attacker could exploit the first vulnerability

to cause a Denial of Service or, in unlikely circumstances, execute

arbitrary code on the host running krb5kdc or kadmind with root

privileges and compromise the Kerberos key database. Exploitation of

the other vulnerabilities might lead to a Denial of Service in kadmind,

krb5kdc, or other daemons performing authorization against Kerberos

that utilize GSS-API or an information disclosure.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All MIT Kerberos 5 users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.6.3-r6"

 

References

==========

 

[ 1 ] CVE-2009-0844

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0844

[ 2 ] CVE-2009-0845

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0845

[ 3 ] CVE-2009-0846

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0846

[ 4 ] CVE-2009-0847

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0847

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200904-09.xml

 

Concerns?

=========

 

Security is a primary focus of Gentoo Linux and ensuring the

confidentiality and security of our users machines is of utmost

importance to us. Any security concerns should be addressed to

security ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2009 Gentoo Foundation, Inc; referenced text

belongs to its owner(s).

 

The contents of this document are licensed under the

Creative Commons - Attribution / Share Alike license.

 

http://creativecommons.org/licenses/by-sa/2.5