VNCAuthProxy authentication bypass vulnerability
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | vncauthproxy | < 1.2.0 | 1.2.0 |
References
- https://github.com/osuosl/twisted_vncauthproxy/commit/edc149af29242178091b2d6fcd42c3ef0851644b
- https://github.com/osuosl/twisted_vncauthproxy/tree/release/1.1.1
- https://pypi.org/project/VNCAuthProxy/
- https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass/
- https://github.com/advisories/GHSA-237r-mx84-7x8c
- https://nvd.nist.gov/vuln/detail/CVE-2022-36436
- https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass
- https://github.com/osuosl/twisted_vncauthproxy
- https://github.com/pypa/advisory-database/tree/main/vulns/vncauthproxy/PYSEC-2022-267.yaml
- https://pypi.org/project/VNCAuthProxy
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-287- Platform
- Python (PyPI)
- Package
vncauthproxy- Disclosed
- 14.09.2022
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2022-267 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-237r-mx84-7x8c - CC BY 4.0
Vulnerability history: vncauthproxy
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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