Low, CVSS 2.0RubyGemsPublished
Bitcoinrb Vulnerable to Command injection via RPC
GHSA-q66h-m87m-j2q6
- Affected
- RubyGems bitcoinrb < 1.12.0
- Fixed in
- 1.12.0· Vendor fix available
- Issue
- Remote Code Execution Unsafe handling of request parameters in the RPC HTTP server results in command injection Details In lib/bitcoin/rpc/httpserver.rb line 30-39, the JSON body of a POST request is parsed into command and args variables. These values are then passed to send, which is used to call an arbitrary class method. However, there is no validation that the provided command value is one of the expected RPC methods. This means that an attacker could supply a command value such as system, and then pass arbitrary system commands into the args parameter and achieve remote code execution. PoC 1. Start the RPC server 2. Send a request to the RPC server as so: 3. Check the /tmp folder on the machine where the RPC server is being run. If a folder /pwned now exists, the vulnerability is confirmed. Impact This vulnerability would impact anyone running the RPC server. The impact is higher for those who are running it publicly exposed to the internet. Remediation Mitigating…
Recommended action: Upgrade to 1.12.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.