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.

Score

CVSS 3.1 7.5 High

Status

Modified - cve-assign@fb.com

Published

2018-12-31

Last modified

2025-05-06

Weaknesses

CWE-119, CWE-212

Affected products

• Folly (Facebook)
• Hhvm (Facebook)

References

• https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f
• https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8
• https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.html