#VU86768 Improper authentication in wpa_supplicant - CVE-2023-52160

Vulnerability identifier: #VU86768

Vulnerability risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2023-52160

CWE-ID: CWE-287

Exploitation vector: Local network

Exploit availability: Yes

Vulnerable software:
wpa_supplicant
Server applications / Encryption software

Vendor: Jouni Malinen

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in the PEAP implementation. A remote attacker can bypass authentication process by sending an EAP-TLV Success packet instead of starting Phase 2.

Successful exploitation of the vulnerability requires that wpa_supplicant is configured to not verify the network's TLS certificate during Phase 1 authentication.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

wpa_supplicant: 0.2 - 13.2

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External links
https://w1.fi/cgit/hostap/commit/?id=8e6485a1bcb0baffdea9e55255a81270b768439c
https://www.top10vpn.com/research/wifi-vulnerabilities/

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.