Real IP address disclosure in Clario VPN for macOS

1) Cleartext transmission of sensitive information

EUVDB-ID: #VU82574

Risk: Medium

CVSSv3.1: 4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-36671

CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to the VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel even if this traffic is not generated by the VPN client. A remote attacker can trick the victim into sending plaintext traffic to the VPN server's IP address and thereby deanonymize the victim.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Clario VPN for macOS: 5.9.1.1662

External links

http://tunnelcrack.mathyvanhoef.com/details.html
http://clario.co/vpn-for-mac/
http://github.com/advisories/GHSA-43fw-xm94-j3mx

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.