Cua computer-server versions before 0.3.42 skip authentication when the CONTAINER_NAME environment variable is unset and bind to all interfaces by default, allowing unauthenticated attackers to execute arbitrary commands. Attackers can reach TCP port 8000 to run shell commands via the run_command endpoint, read and write arbitrary files through file operation endpoints, and access interactive PTY shells without authentication.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/trycua/cua
disclosure@vulncheck.com
https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/com…
disclosure@vulncheck.com
https://github.com/trycua/cua/blob/10a2e71792db/libs/python/computer-server/com…
disclosure@vulncheck.com
https://github.com/trycua/cua/commit/59cf25c0ec54
disclosure@vulncheck.com
https://github.com/trycua/cua/issues/1892
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/cua-computer-server-before-0.3.42-unauthen…
disclosure@vulncheck.com