harden: use bounded strlcpy/snprintf in u_merkle_cache.h... - #19
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…copy-fn security vulnerability Automated security fix generated by OrbisAI Security
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Summary
Harden input handling in
bin/u_merkle_cache.h(flagged by semgrep).Vulnerability
c.lang.security.insecure-use-string-copy-fn.insecure-use-string-copy-fnbin/u_merkle_cache.h:187Description: Finding triggers whenever there is a strcpy or strncpy used. This is an issue because strcpy does not affirm the size of the destination array and strncpy will not automatically NULL-terminate strings. This can lead to buffer overflows, which can cause program crashes and potentially let an attacker inject code in the program. Fix this by using strcpy_s instead (although note that strcpy_s is an optional part of the C11 standard, and so may not be available).
Changes
bin/u_merkle_cache.hBehavior Preservation
The change is scoped to 1 file on the vulnerable path; it only tightens handling of untrusted input and leaves valid inputs unaffected.
This patch removes an exploit primitive — a code pattern that, while not independently exploitable today, could be chained with other weaknesses by automated exploit-development tooling. Proactive removal of such primitives raises the bar against increasingly capable automated attack tools.
Automated security fix by OrbisAI Security