CVE-2018-6337

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.

Date published : 2018-12-31

https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f

https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8