CVE-2022-36436
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.02% probability · 80th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- osuosl/twisted vnc authentication proxy
- Source
- cve@mitre.org
References
- https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass/Exploit, Patch
- https://github.com/osuosl/twisted_vncauthproxy/commit/edc149af29242178091b2d6fcd42c3ef0851644bPatch
- https://github.com/osuosl/twisted_vncauthproxy/tree/release/1.1.1Release Notes
- https://pypi.org/project/VNCAuthProxy/Product
- https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass/Exploit, Patch
- https://github.com/osuosl/twisted_vncauthproxy/commit/edc149af29242178091b2d6fcd42c3ef0851644bPatch
- https://github.com/osuosl/twisted_vncauthproxy/tree/release/1.1.1Release Notes
- https://pypi.org/project/VNCAuthProxy/Product
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.