FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability

BID:17171

Info

FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability

Bugtraq ID: 17171
Class: Input Validation Error
CVE: CVE-2006-1354
Remote: Yes
Local: No
Published: Mar 21 2006 12:00AM
Updated: Jan 25 2007 04:19PM
Credit: Announced by the vendor.
Vulnerable: Trustix Secure Linux 3.0
Trustix Secure Linux 2.2
SuSE Linux Enterprise Server 9
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 9.3 x86_64
S.u.S.E. Linux Professional 9.3
S.u.S.E. Linux Professional 9.2 x86_64
S.u.S.E. Linux Professional 9.2
S.u.S.E. Linux Professional 9.1 x86_64
S.u.S.E. Linux Professional 9.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 9.3 x86_64
S.u.S.E. Linux Personal 9.3
S.u.S.E. Linux Personal 9.2 x86_64
S.u.S.E. Linux Personal 9.2
S.u.S.E. Linux Personal 9.1 x86_64
S.u.S.E. Linux Personal 9.1
Redhat Enterprise Linux ES 4
Redhat Enterprise Linux ES 3
Redhat Enterprise Linux AS 4
Redhat Enterprise Linux AS 3
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
FreeRADIUS FreeRADIUS 1.1
FreeRADIUS FreeRADIUS 1.0.5
FreeRADIUS FreeRADIUS 1.0.4
FreeRADIUS FreeRADIUS 1.0.3
FreeRADIUS FreeRADIUS 1.0.2
+ Gentoo Linux
FreeRADIUS FreeRADIUS 1.0.1
FreeRADIUS FreeRADIUS 1.0
Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
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
Not Vulnerable: FreeRADIUS FreeRADIUS 1.1.1

Discussion

FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability

FreeRADIUS is prone to an authentication-bypass vulnerability. The issue exists in the EAP-MSCHAPv2 state machine. Bypassing authentication could also cause the server to crash.

FreeRADIUS versions from 1.0.0 to 1.1.0 are vulnerable.

Exploit / POC

FreeRADIUS EAP-MSCHAPv2 Authentication Bypass 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]

Solution / Fix

FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability

Solution:
This issue has been addressed in FreeRADIUS 1.1.1.

Please see the references for more information and fixes.


FreeRADIUS FreeRADIUS 1.0

FreeRADIUS FreeRADIUS 1.0.1

FreeRADIUS FreeRADIUS 1.0.2

FreeRADIUS FreeRADIUS 1.0.3

FreeRADIUS FreeRADIUS 1.0.4

FreeRADIUS FreeRADIUS 1.0.5

FreeRADIUS FreeRADIUS 1.1

Trustix Secure Linux 2.2

Trustix Secure Linux 3.0

References

FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability

References:
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