Heimdal Kerberos Cross-Realm Trust Impersonation Vulnerability

BID:10035

Info

Heimdal Kerberos Cross-Realm Trust Impersonation Vulnerability

Bugtraq ID: 10035
Class: Input Validation Error
CVE: CVE-2004-0371
Remote: No
Local: Yes
Published: Apr 02 2004 12:00AM
Updated: Jul 12 2009 04:06AM
Credit: This issue was disclosed by the vendor.
Vulnerable: OpenBSD OpenBSD 3.5
OpenBSD OpenBSD 3.4
KTH Heimdal 0.6.1
KTH Heimdal 0.6 .0
KTH Heimdal 0.5.3
KTH Heimdal 0.5.2
KTH Heimdal 0.5.1
+ FreeBSD FreeBSD 5.0
KTH Heimdal 0.5
- Gentoo Linux 1.4 _rc1
 - Gentoo Linux 1.2
KTH Heimdal 0.4 e
+ FreeBSD FreeBSD 4.6 -RELEASE
 + FreeBSD FreeBSD 4.6
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.3
- FreeBSD FreeBSD 4.2
- FreeBSD FreeBSD 4.1.1
- FreeBSD FreeBSD 4.1
- FreeBSD FreeBSD 4.0
+ SuSE Linux 8.0
KTH Heimdal 0.4 d
+ SuSE Linux 7.3
KTH Heimdal 0.4 c
KTH Heimdal 0.4 b
KTH Heimdal 0.4 a
Heimdal Heimdal 0.6.1
Heimdal Heimdal 0.6
Heimdal Heimdal 0.5.2
Heimdal Heimdal 0.5.1
Heimdal Heimdal 0.5 .0
Heimdal Heimdal 0.4 e
+ 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
Heimdal Heimdal 0.4 d
Heimdal Heimdal 0.4 c
Heimdal Heimdal 0.4 b
Heimdal Heimdal 0.4 a
Not Vulnerable: KTH Heimdal 0.6.1
KTH Heimdal 0.5.3
Heimdal Heimdal 0.6.1
Heimdal Heimdal 0.5.3

Discussion

Heimdal Kerberos Cross-Realm Trust Impersonation Vulnerability

It has been reported that Heimdal is prone to a cross-realm trust impersonation vulnerability. This issue is due to a failure of the implementation to properly validate cross-realm requests.

An attacker may leverage this issue to mask their identity, potentially conducting attacks or other nefarious activity while feigning to be someone else.

Exploit / POC

Heimdal Kerberos Cross-Realm Trust Impersonation 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

Heimdal Kerberos Cross-Realm Trust Impersonation Vulnerability

Solution:
The vendor has released an upgrade dealing with this issue.

Debian Linux has released advisory DSA 476-1 and fixes dealing with this issue. Please see the attached advisory for more information and details on obtaining fixes.

Gentoo has released updates for this issue that may be applied with the following commands:
# emerge sync
# emerge -pv ">=app-crypt/heimdal-0.6.1"
# emerge ">=app-crypt/heimdal-0.6.1"

FreeBSD has released advisory FreeBSD-SA-04:08 dealing with this issue. Please see the referenced advisory for more information and details on obtaining updates.

OpenBSD has released fixes to address this issue.


OpenBSD OpenBSD 3.5

OpenBSD OpenBSD 3.4

KTH Heimdal 0.4 e

Heimdal Heimdal 0.4 e

KTH Heimdal 0.5

KTH Heimdal 0.5.1

KTH Heimdal 0.5.2

KTH Heimdal 0.6 .0

References

Heimdal Kerberos Cross-Realm Trust Impersonation Vulnerability

References:
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