Buffer overflow in Facebook Hhvm
CVE-2016-6870
Out-of-bounds write in the (1) mb_detect_encoding, (2) mb_send_mail, and (3) mb_detect_order functions in Facebook HHVM before 3.15.0 allows attackers to have unspecified impact via unknown vectors.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.022 (81.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2016/08/11/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
- github.com/facebook/hhvm/commit/365abe807cab2d60dc9ec307292a06181f77a9c2 (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2016/08/19/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-6870?
- CVE-2016-6870 is a critical-severity vulnerability in Facebook Hhvm, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2017-02-17.
- How severe is CVE-2016-6870?
- Critical severity. CVSS v3 base score is 9.8 out of 10.