Buffer overflow in Facebook Hhvm
CVE-2019-11929
Insufficient boundary checks when formatting numbers in number_format allows read/write access to out-of-bounds memory, potentially leading to remote code execution. This issue affects HHVM versions prior to 3.30.10, all versions between 4…
Vulnerability class: Buffer Overflow
EPSS: 0.040 (89.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Facebook Hhvm — versions 4.20.0, unspecified, 4.19.0
Weakness classification (CWE)
References
- cve-assign@fb.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- cve-assign@fb.com (x_refsource_CONFIRM, Vendor Advisory)
- cve-assign@fb.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11929?
- CVE-2019-11929 is a critical-severity vulnerability in Facebook Hhvm, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-10-02.
- How severe is CVE-2019-11929?
- Critical severity. CVSS v3 base score is 9.8 out of 10.