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 traffic to the local network is sent in plaintext outside the VPN tunnel even if the local network is using a non-RFC1918 IP subnet. This allows an adversary to trick the victim into sending arbitrary IP traffic in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in leakage of traffic in plaintext" rather than to only Clario.
References (4)
Core 4
Core References
Product
https://clario.co/vpn-for-mac/
Third Party Advisory
https://mullvad.net/de/blog/2023/8/9/response-to-tunnelcrack-vulnerability-disclosure/
Exploit, Third Party Advisory
https://tunnelcrack.mathyvanhoef.com/details.html
Various Sources
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015
Scores
CVSS v3
5.7
EPSS
0.0068
EPSS Percentile
47.5%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-319
Status
published
Products (1)
clario/vpn
< 5.9.1.1662
Published
Aug 09, 2023
Tracked Since
Feb 18, 2026