Tunnelblick is an open source graphic user interface for OpenVPN on macOS. In versions 3.3beta26 through 9.0beta01, any local user can read arbitrary root-owned files by exploiting a symlink following vulnerability in tunnelblick-helper, reachable through the world-accessible tunnelblickd Unix socket. The socket is configured with mode 0666, allowing any local user to connect. No authorization check is performed on the connecting client. The tunnelblick-helper process constructs a path to config.ovpn inside a user-controlled .tblk directory and reads it as root without symlink validation. An attacker can create a .tblk configuration with a symlinked config.ovpn pointing to any file and request tunnelblickd to read it. This issue has been fixed in versions 9.0beta02.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.5.3, < 8.0.1CPE matchmatch criteria | cpe:2.3:a:tunnelblick:tunnelblick:*:*:*:*:*:*:*:* | ||
3.3CPE matchmatch criteria | cpe:2.3:a:tunnelblick:tunnelblick:3.3:beta26:*:*:*:*:*:* | ||
8.1CPE matchmatch criteria | cpe:2.3:a:tunnelblick:tunnelblick:8.1:beta01:*:*:*:*:*:* | ||
8.1CPE matchmatch criteria | cpe:2.3:a:tunnelblick:tunnelblick:8.1:beta02:*:*:*:*:*:* | ||
8.1CPE matchmatch criteria | cpe:2.3:a:tunnelblick:tunnelblick:8.1:beta03:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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