Buffer overflow in Facebook Folly
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.018 (77.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Facebook Folly — versions v2018.08.09.00, v2017.12.11.00, unspecified
- Facebook Hhvm — versions 3.26.3, 3.26.0, unspecified
Weakness classification (CWE)
References
- hhvm.com/blog/2018/05/24/hhvm-3.26.3.html (Release Notes, Vendor Advisory)
- github.com/facebook/folly/commit/8e927ee48b114c8a2f90d0cbd5ac753795a6761f (Patch, Third Party Advisory)
- github.com/facebook/hhvm/commit/e2d10a1e32d01f71aaadd81169bcb9ae86c5d6b8 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-6337?
- CVE-2018-6337 is a high-severity vulnerability in Facebook Folly, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 7.5/10. Published 2018-12-31.
- How severe is CVE-2018-6337?
- High severity. CVSS v3 base score is 7.5 out of 10.