#VU6798 Authentication bypass in FreeRADIUS - CVE-2017-9148

Vulnerability identifier: #VU6798

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9148

CWE-ID: CWE-592

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeRADIUS
Server applications / Directory software, identity management

Vendor: FreeRADIUS Server Project

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

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External links
https://freeradius.org/security.html

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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