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.
History

Tue, 06 May 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: facebook

Published: 2018-12-31T22:00:00.000Z

Updated: 2025-05-06T16:39:21.216Z

Reserved: 2018-01-26T00:00:00.000Z

Link: CVE-2018-6337

cve-icon Vulnrichment

Updated: 2024-08-05T06:01:48.614Z

cve-icon NVD

Status : Modified

Published: 2018-12-31T22:29:00.247

Modified: 2025-05-06T17:15:50.983

Link: CVE-2018-6337

cve-icon Redhat

No data.