Insecure Buffer Reuse in folly::secureRandom during fork()

CVE-2018-6337 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

folly::secureRandom will re-use a buffer between parent and child processes when fork() is called. That will result in multiple forked children producing repeat (or similar) results. This affects HHVM 3.26 prior to 3.26.3 and the folly library between v2017.12.11.00 and v2018.08.09.00.

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