| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/tobychui/zoraxy | ≥ 2.6.1, < 3.1.3< 3.1.3+incompatible | 3.1.33.1.3+incompatible |
A command injection vulnerability in the Web SSH feature allows an authenticated attacker to execute arbitrary commands as root on the host.
Zoraxy has a Web SSH terminal feature that allows authenticated users to connect to SSH servers from their browsers.
In HandleCreateProxySession the request to create an SSH session is handled. After checking for the presence of required parameters, ensuring that the target is not the loopback interface and that there is actually an SSH service running on the target, CreateNewConnection is called:
In line 178, the gotty binary is executed running sshCommand from the line above. It contains the user-controlled variable connAddr, which includes the hostname of the SSH server and - if provided - the username.
An attacker can exploit the username variable to escape from the bash command and inject arbitrary commands into sshCommand. This is possible, because, unlike hostname and port, the username is not validated or sanitized.
This vulnerability was introduced in https://github.com/tobychui/zoraxy/commit/c07d5f85dfc37bd32819358ed7d4bc32c604e8f0.
If Zoraxy is run without authentication of the management interface (started with-noauth), this vulnerability can be exploited without authentication.
Additionally, if Zoraxy is run in Docker with the Docker socket mounted (as described in https://github.com/tobychui/zoraxy/blob/9cb315ea6739d1cc201b690322d25166b12dc5db/docker/README.md), this vulnerability can be exploited to escape the Zoraxy container and gain access to the Docker host.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site freegithub.com; bash ; as userConnect using SSHbash running on the Zoraxy hostDemo:
This vulnerability allows an authenticated attacker to gain remote code execution with the privileges of the Zoraxy process (root by default). This affects Zoraxy versions 2.6.1 through 3.1.2.