test: Assert RPC Server binds before creating cookie #26964
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This allows specification that log entries should be detected in the order they are passed in through their argument list.
If we don't bind before creating the authentication cookie a race condition exists where malware could restart the node, bind to the RPC port and read the current cookie before bitcoind binds.
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The following sections might be updated with supplementary metadata relevant to reviewers and maintainers. ReviewsSee the guideline for information on the review process. ConflictsNo conflicts as of last run. |
maflcko
changed the title
This was referenced Feb 11, 2023
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The feature request didn't seem to attract much attention in the past. Also, the issue seems not important enough right now to keep it sitting around idle in the list of open issues. Closing due to lack of interest. Pull requests with improvements are always welcome. |
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Is this related to CVE-2018-20587?
Edit: This doesn't fix anything, just tests for correct behaviour. |
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If the RPC server does not bind first there exists a race condition between malware and bitcoind to bind to the port and recieve a cookie request from external application.
This test relies on the order of log messages, which may (I don't know) be slightly brittle. However because both
InitHTTPServer()andStartHTTPRPC()are called in single-threaded series from withinAppInitServers()it should work well enough.bitcoin/src/init.cpp
Lines 667 to 672 in 50ac8f5