CyberRota Analysis
AI-GeneratedAuthenticated clients using versions prior to 1.11.5 of Chisel can exploit a flaw that allows them to bypass ACL restrictions, enabling them to tunnel traffic to any arbitrary destination reachable from the server after initial authentication. This vulnerability poses a significant risk as it could lead to unauthorized access and data exfiltration. Organizations utilizing Chisel for tunneling should prioritize upgrading to version 1.11.5 to mitigate this security risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Chisel is a TCP/UDP tunnel, transported over HTTP and secured via SSH. In versions prior to 1.11.5, authenticated clients can bypass --authfile ACL restrictions and tunnel traffic to arbitrary destinations reachable from the server. The ACL is enforced only during the initial handshake against declared remotes, but never on subsequent SSH channels that carry actual traffic. A malicious client can authenticate with a permitted remote, then open channels to any host:port it wants. This issue has been fixed in version 1.11.5.