Analyze Apache httpd scoreboard.c for out-of-bounds memory bug
Session from security-audits on Hugging Face by jedisct1 · MIT · condensed by Coders Talk
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0ssession
0interventions
by library · 2h
GOAL
Review the committed server/scoreboard.c source to identify potential memory-safety vulnerabilities in the scoreboard update functions.
- +0Prompt · +0Shared server/scoreboard.c source for review as committed evidence
- +0Agent did · +0Analyzed update_child_status_internal, found child_num/thread_num are not validated against server_limit/thread_limit before indexing ap_scoreboard_image->servers[][], producing an out-of-bounds memory-safety proof
- +0Outcome · +0Identified a memory-safety vulnerability at scoreboard.c line 491: missing upper-bound checks on child_num and thread_num before dereference, reachable via public status-update wrappers; fix outline proposed to validate both indexes
VERDICT
I'd start by asking the agent to specifically check every public index into ap_scoreboard_image against server_limit and thread_limit, since that's exactly the gap it found here. The analysis correctly traced the call path from the public wrappers down to the unchecked dereference, which did the real work of confirming this was reachable and not just theoretical.