MIT Kerberos 5 ASN.1 Decoder Denial Of Service Vulnerability

BID:11079

Info

MIT Kerberos 5 ASN.1 Decoder Denial Of Service Vulnerability

Bugtraq ID: 11079
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2004-0644
Remote: Yes
Local: No
Published: Aug 31 2004 12:00AM
Updated: Jul 12 2009 07:06AM
Credit: Will Fiveash and Nico Williams from Sun disclosed this vulnerability to the vendor.
Vulnerable: Turbolinux Turbolinux Server 8.0
Turbolinux Turbolinux Desktop 10.0
Turbolinux Appliance Server Workgroup Edition 1.0
Turbolinux Appliance Server Hosting Edition 1.0
Sun Solaris 9_x86
Sun Solaris 9
Redhat Linux 9.0 i386
Redhat Linux 7.3 i686
Redhat Linux 7.3 i386
Redhat Linux 7.3
Redhat Fedora Core2
Redhat Fedora Core1
Redhat Enterprise Linux WS 3
Redhat Enterprise Linux ES 3
Redhat Enterprise Linux AS 3
Redhat Desktop 3.0
OpenPKG OpenPKG 2.1
OpenPKG OpenPKG 2.0
OpenPKG OpenPKG Current
MIT Kerberos 5 1.3.4
+ Mandriva Linux Mandrake 10.1 x86_64
 + Mandriva Linux Mandrake 10.1
+ Turbolinux Turbolinux Server 10.0
MIT Kerberos 5 1.3.3
MIT Kerberos 5 1.3.2
MIT Kerberos 5 1.3.1
MIT Kerberos 5 1.3 -alpha1
MIT Kerberos 5 1.3
+ Mandriva Linux Mandrake 10.0 AMD64
 + Mandriva Linux Mandrake 10.0
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
MIT Kerberos 5 1.2.8
MIT Kerberos 5 1.2.7
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ Redhat Linux 9.0 i386
 MIT Kerberos 5 1.2.6
MIT Kerberos 5 1.2.5
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 9.0
+ Redhat Linux 8.0 i386
 + Redhat Linux 8.0
+ Turbolinux Home
+ Turbolinux Turbolinux 10 F...
 + Turbolinux Turbolinux Desktop 10.0
+ Turbolinux Turbolinux Server 8.0
+ Wirex Immunix OS 7+
 MIT Kerberos 5 1.2.4
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
+ Redhat Linux 7.3 i386
 + Redhat Linux 7.3
MIT Kerberos 5 1.2.3
MIT Kerberos 5 1.2.2 -beta1
MIT Kerberos 5 1.2.2
Mandriva Linux Mandrake 10.0 AMD64
Mandriva Linux Mandrake 10.0
Mandriva Linux Mandrake 9.2 amd64
Mandriva Linux Mandrake 9.2
Mandriva Linux Mandrake 9.1 ppc
Mandriva Linux Mandrake 9.1
MandrakeSoft Multi Network Firewall 2.0
MandrakeSoft Corporate Server 2.1 x86_64
MandrakeSoft Corporate Server 2.1
IBM Tivoli Access Manager for e-business 5.1
Gentoo Linux 1.4 _rc3
Gentoo Linux 1.4 _rc2
Gentoo Linux 1.4 _rc1
Gentoo Linux 1.4
Debian Linux 3.0 sparc
Debian Linux 3.0 s/390
Debian Linux 3.0 ppc
Debian Linux 3.0 mipsel
Debian Linux 3.0 mips
Debian Linux 3.0 m68k
Debian Linux 3.0 ia-64
Debian Linux 3.0 ia-32
Debian Linux 3.0 hppa
Debian Linux 3.0 arm
Debian Linux 3.0 alpha
Debian Linux 3.0
Cisco VPN 3000 Concentrator 4.1 .x
Cisco VPN 3000 Concentrator 4.0.1
Cisco VPN 3000 Concentrator 4.0 .x
Cisco VPN 3000 Concentrator 4.0
Avaya S8700 R2.0.1
Avaya S8700 R2.0.0
Avaya S8500 R2.0.1
Avaya S8500 R2.0.0
Avaya S8300 R2.0.1
Avaya S8300 R2.0.0
Avaya Integrated Management
Avaya CVLAN
Avaya Converged Communications Server 2.0
Apple Mac OS X Server 10.3.6
Apple Mac OS X Server 10.3.5
Apple Mac OS X Server 10.3.4
Apple Mac OS X Server 10.3.3
Apple Mac OS X Server 10.3.2
Apple Mac OS X Server 10.3.1
Apple Mac OS X Server 10.3
Apple Mac OS X Server 10.2.8
Apple Mac OS X Server 10.2.7
Apple Mac OS X Server 10.2.6
Apple Mac OS X Server 10.2.5
Apple Mac OS X Server 10.2.4
Apple Mac OS X Server 10.2.3
Apple Mac OS X Server 10.2.2
Apple Mac OS X Server 10.2.1
Apple Mac OS X Server 10.2
Apple Mac OS X 10.3.6
Apple Mac OS X 10.3.5
Apple Mac OS X 10.3.4
Apple Mac OS X 10.3.3
Apple Mac OS X 10.3.2
Apple Mac OS X 10.3.1
Apple Mac OS X 10.3
Apple Mac OS X 10.2.8
Apple Mac OS X 10.2.7
Apple Mac OS X 10.2.6
Apple Mac OS X 10.2.5
Apple Mac OS X 10.2.4
Apple Mac OS X 10.2.3
Apple Mac OS X 10.2.2
Apple Mac OS X 10.2.1
Apple Mac OS X 10.2
Not Vulnerable: MIT Kerberos 5 1.3.5
+ Trustix Secure Enterprise Linux 2.0
+ Trustix Secure Linux 2.2
+ Trustix Secure Linux 2.1
Cisco VPN 3000 Concentrator 4.1.5 .B
Cisco VPN 3000 Concentrator 4.0.5 .B

Discussion

MIT Kerberos 5 ASN.1 Decoder Denial Of Service Vulnerability

It is reported that MIT Kerberos V is susceptible to a denial of service vulnerability in its ASN.1 decoder.

This vulnerability presents itself when the krb5 library attempts to decode a malformed ASN.1 buffer.

As a result of this vulnerability, a remote attacker may be able to deny all Kerberos service in a realm by sending malicious UDP packets to all KDCs (Key Distribution Center). The affected KDCs would then stop servicing further authentication requests. All services utilizing Kerberos for authentication would fail to allow further requests.

MIT Kerberos V versions 1.2.2 through to 1.3.4 are reportedly affected by this vulnerability.

Update: IBM has reported that IBM Tivoli Access Manager for e-business version 5.1 is vulnerable to this issue when configured for single sign on using SPNEGO authentication.

Exploit / POC

MIT Kerberos 5 ASN.1 Decoder Denial Of Service Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

MIT Kerberos 5 ASN.1 Decoder Denial Of Service Vulnerability

Solution:
The vendor has released an advisory (MITKRB5-SA-2004-003) along with patches to resolve this issue. Please see the referenced advisory for further information.

Debian GNU/Linux has released an advisory (DSA 543-1) along with fixes to address this and other issues. Please see the referenced advisory for further information.

RedHat Linux has released advisory RHSA-2004:350-12 along with fixes to address this and other issues in RedHat Enterprise Linux operating systems. Please see the referenced advisory for further information.

RedHat Linux has released advisories (FEDORA-2004-276, and FEDORA-2004-277) to address this and other issues for RedHat Fedora Core 1 and 2 respectively. Please see the referenced advisories for further information.

Cisco has released an advisory (cisco-sa-20040831-krb5) to address this and other issues for Cisco VPN 3000 series products. Please see the referenced advisory for further information on obtaining fixes.

Mandrake has released an advisory (MDKSA-2004:088) and fixes to address this issue. Please see the referenced advisory for further information on obtaining fixes.

Sun has released Security Alert ID 57631 along with fixes to address this issue. Please see the web reference for more information.

Trustix has released an advisory (TSL-2004-0045) to address various issues in kerberos5. Please see the referenced advisory for more information.

Gentoo advisory available. Users are advised to upgrade by performing the following steps:
emerge sync
emerge -pv ">=app-crypt/mit-krb5-1.3.4"
emerge ">=app-crypt/mit-krb5-1.3.4"

Conectiva has made advisory CLSA-2004:860 along with fixes available resolving these and other issues. Please see the referenced advisory for more information.

Avaya has released advisory ASA-2004-039 dealing with this issue. Please see the referenced web advisory for more information.

OpenPKG has released advisory OpenPKG-SA-2004.039 to address this, and other issues. Please see the referenced advisory for further information.

Turbolinux has released advisory TLSA-2004-22 to address this, and other issues. Please see the referenced advisory for further information.

IBM has released information about this issue affecting IBM Tivoli Access Manager for e-business version 5.1. Please see the IBM 'MIT Kerberos 5 Vulnerabilities' reference in Web references for more information about obtaining fixes.

Apple has released an advisory (APPLE-SA-2004-12-02) dealing with this and other issues. Please see the referenced advisory for more information.

Fedora Legacy has released security advisory FLSA:154276 addressing this issue for RedHat Linux 7.3 and 9, and for Fedora Core 1. Please see the referenced advisory for details on obtaining and applying the appropriate updates.


MIT Kerberos 5 1.2.2 -beta1

MIT Kerberos 5 1.2.4

MIT Kerberos 5 1.2.5

MIT Kerberos 5 1.2.6

MIT Kerberos 5 1.2.7

MIT Kerberos 5 1.2.8

MIT Kerberos 5 1.3 -alpha1

MIT Kerberos 5 1.3

MIT Kerberos 5 1.3.1

MIT Kerberos 5 1.3.2

MIT Kerberos 5 1.3.3

MIT Kerberos 5 1.3.4

Apple Mac OS X 10.2

Apple Mac OS X 10.2.1

Apple Mac OS X 10.2.2

Apple Mac OS X 10.2.3

Apple Mac OS X 10.2.4

Apple Mac OS X 10.2.5

Apple Mac OS X 10.2.7

Apple Mac OS X 10.2.8

Apple Mac OS X 10.3

Apple Mac OS X 10.3.1

Apple Mac OS X 10.3.2

Apple Mac OS X 10.3.3

Apple Mac OS X 10.3.4

Apple Mac OS X 10.3.5

Apple Mac OS X Server 10.3.6

IBM Tivoli Access Manager for e-business 5.1

References

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