FreeRADIUS EAP-MSCHAPv2 authentication bypass
| freeradius-eap-mschapv2-auth-bypass (25352) |  Medium Risk |
Description:
FreeRADIUS could allow a remote attacker to bypass server authentication, caused by a vulnerability in the EAP-MSCHAPv2 module. A remote attacker in control of a malicious EAP-MSCHAPv2 client could bypass authentication checks and cause the server to crash.
Platforms Affected:
- Debian, Debian Linux 3.1
- FreeRADIUS, FreeRADIUS 1.0.0 - 1.1.0
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux 2006 X86_64
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 ES
- SuSE, SuSE Linux 10.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux 9.2
- SuSE, SuSE Linux 9.3
- SuSE, SuSE SLES 9
Remedy:
Upgrade to the latest version of FreeRADIUS (1.1.1 or later), available from the FreeRADIUS Web site. See References.
For Red Hat Linux:
Refer to RHSA-2006:0271-12 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2006-04-03 for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux:
Refer to DSA-1089-1 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux:
Refer to SUSE Security Announcement SUSE-SA:2006:019 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Bypass Security
References:
- FreeRADIUS Web site, FreeRADIUS - getting the code at http://www.freeradius.org/getting.html.
- FreeRADIUS Web site, Security Contacts and notifications at http://www.freeradius.org/security.html.
- ASA-2006-100: freeradius security update (RHSA-2006-0271)
- BID-17171: FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability
- CVE-2006-1354: Unspecified vulnerability in FreeRADIUS 1.0.0 up to 1.1.0 allows remote attackers to bypass authentication or cause a denial of service (server crash) via Insufficient input validation in the EAP-MSCHAPv2 state machine module.
- DSA-1089: freeradius -- several vulnerabilities
- GLSA-200604-03: FreeRADIUS: Authentication bypass in EAP-MSCHAPv2 module
- MDKSA-2006:060: Updated FreeRADIUS packages fix EAP-MSCHAPv2 module vulnerability
- RHSA-2006-0271: freeradius security update
- SA19300: FreeRADIUS EAP-MSCHAPv2 Authentication Bypass Vulnerability
- SECTRACK ID: 1015795: FreeRADIUS Input Validation Error in EAP-MSCHAPv2 Module May Let Remote Users Bypass Authentication
- SUSE-SA:2006:019: freeradius authentication bypass
- VUPEN/ADV-2006-1016: FreeRADIUS EAP-MSCHAPv2 Security Bypass and Denial of Service Vulnerability
Reported:
Mar 20, 2006
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