Authentication bypass in FreeRADIUS

1) Authentication bypass

EUVDB-ID: #VU6798

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9148

CWE-ID: CWE-592 - Authentication Bypass Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication on the target system.

The weakness exists due to failure when preventing resumption of an unauthenticated session by TLS session cache. A remote attacker can use PEAP or TTLS to bypass authentication and cause the target server to issue an Extensible Authentication Protocol (EAP)

Successful exploitation of the vulnerability may result in unauthorized access to the system.

Mitigation

Update to version 3.0.14.

Vulnerable software versions

FreeRADIUS: 0.1 - 3.0.13

External links

http://freeradius.org/security.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.