جزئیات آسیب‌پذیری

Starman versions before 0.4019 for Perl allow a stalled request body to hold a worker indefinitely, as read_timeout covers only the headers. Content-Length and chunked request bodies are read with blocking reads and no deadline. A client that sends complete headers and then stalls or trickles the body keeps the worker waiting until it disconnects. A remote attacker can take every worker with a few such connections, five with the default worker count, so the server stops answering requests. Version 0.4019 applies read_timeout to each wait for body data and adds a body_timeout limit, 300 seconds by default, on the total time to read a body.

• https://github.com/miyagawa/Starman/commit/89dffd3bdc9baa1cbe1b48a43615586ba2588558.patch patch
• https://github.com/miyagawa/Starman/commit/a30533c03051502d6b67cd48b3a95a61e129691b.patch patch
• https://metacpan.org/release/MIYAGAWA/Starman-0.4019/changes release-notes