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.

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

EPSS: 0.010 (77.0th percentile) — read the EPSS interpretation.

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.

Affected products

Facebook Hhvm
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (mailing-list, x_refsource_MLIST, Patch, Mailing List, Third Party Advisory)
cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
cve@mitre.org (mailing-list, x_refsource_MLIST, 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.