my colleagues Alexis and Brad at Trail of Bits (npub1rcs…7sw8) put together a great post on a basic security mistake that we keep making: attacker-controlled recursion. my favorite thing about these is that they're (1) trivial to find and (2) *way* more impactful than normal DoS spam.
the post contains some great examples of these, including real vulnerabilities in Protobuf and ElasticSearch:
https://blog.trailofbits.com/2025/02/21/dont-recurse-on-untrusted-input/
they'll also be presenting their findings at DistrictCon (npub14f6…c7y5) tomorrow!
https://www.districtcon.org/bios-and-talks-2025/low-effort-dos-with-recursion