VulnerabilityModified
CVE-2018-6337
folly::secureRandom will re-use a buffer between parent and child processes when fork() is called.
HIGH 7.5EPSS 1.78%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.78%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.78% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-212, CWE-119
- Affected
- facebook/folly · facebook/hhvm
- Source
- cve-assign@fb.com
References
- https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761fPatch, Third Party Advisory
- https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8Patch, Third Party Advisory
- https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.htmlRelease Notes, Vendor Advisory
- https://github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761fPatch, Third Party Advisory
- https://github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8Patch, Third Party Advisory
- https://hhvm.com/blog/2018/05/24/hhvm-3.26.3.htmlRelease Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.