CVE-2023-36671

MEDIUM 6.3CVE-2023-36671 · Published 09/08/2023 · updated 17/06/2026

In short

CVE-2023-36671 is a MEDIUM (CVSS 6.3) vulnerability affecting vpn (clario).
Chance of exploitation in the next 30 days (EPSS): 0.25%, higher than 17.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
vpn clario	`≤ 5.9.1.1662`	No fix yet

Description

An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS. 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. This allows an adversary to trick the victim into sending plaintext traffic to the VPN server's IP address and thereby deanonymize the victim. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "ServerIP attack for only traffic to the real IP address of the VPN server" rather than to only Clario.

References

clario.co/vpn-for-mac · Product
psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015
tunnelcrack.mathyvanhoef.com/details.html · Exploit

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