CVE-2022-36436 VNCAuthProxy authentication bypass vulnerability
Remote attackers can bypass authentication to access or disconnect VNC sessions via the VNCAuthProxy server without credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-36436?
CVE-2022-36436 is a critical authentication bypass vulnerability in n/a, published on 14 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSU Open Source Lab VNCAuthProxy through 1.1.1 is affected by an vncap/vnc/protocol.py VNCServerAuthenticator authentication-bypass vulnerability that could allow a malicious actor to gain unauthorized access to a VNC session or to disconnect a legitimate user from a VNC session. A remote attacker with network access to the proxy server could leverage this vulnerability to connect to VNC servers protected by the proxy server without providing any authentication credentials. Exploitation of this issue requires that the proxy server is currently accepting connections for the target VNC server.
Weakness: CWE-287
Which versions are affected by CVE-2022-36436?
3 open source packages ship an affected version, including vncauthproxy. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vncauthproxy PyPI | All versions | 1.2.0 |
vncauthproxy PyPI | All versions | 1.2.0 |
vncauthproxy PyPI | All versions | 1.2.0 |
Products include Osuosl Twisted Vnc Authentication Proxy.
How do I fix CVE-2022-36436?
Upgrade vncauthproxy to 1.2.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2022-36436 being exploited?
There is no known exploitation of CVE-2022-36436 in the wild and no public exploit code.
Sources
Also known as GHSA-237r-mx84-7x8c, PYSEC-2022-267.