CVE-2023-36672 json
An issue was discovered in the Clario VPN client through 5.9.1.1662 for macOS.
published 2023-08-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-40615
- cvss
- 5.7
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- tunnelcrack.mathyvanhoef.com https://tunnelcrack.mathyvanhoef.com/details.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.7 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
Classification
- Weakness
-
- CWE-319 Cleartext Transmission of Sensitive Information
References
-
tunnelcrack.mathyvanhoef.com
/details.html
exploit, third-party-advisory
-
clario.co
/vpn-for-mac/
product
-
mullvad.net
/de/blog/2023/8/9/response-to-tunnelcrack-vulnerability-disclosure/
third-party-advisory
- psirt.global.sonicwall.com /vuln-detail/SNWLID-2023-0015
Sources
- CVE List CVE-2023-36672
- NVD CVE-2023-36672
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.