CVE-2016-6870

moderate-risk

Published 2017-02-17

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.

Do I need to act?

0.97% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Fix available

Upgrade to: 365abe807cab2d60dc9ec307292a06181f77a9c2

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (1)

Hhvm

Affected Vendors

Facebook

References (6)

Mailing List http://www.openwall.com/lists/oss-security/2016/08/11/1

Mailing List http://www.openwall.com/lists/oss-security/2016/08/19/1

Patch https://github.com/facebook/hhvm/commit/365abe807cab2d60dc9ec307292a06181f77a9c2

Mailing List http://www.openwall.com/lists/oss-security/2016/08/11/1

Mailing List http://www.openwall.com/lists/oss-security/2016/08/19/1

Patch https://github.com/facebook/hhvm/commit/365abe807cab2d60dc9ec307292a06181f77a9c2

/ 100

moderate-risk

Severity 32/34 · Critical

Exploitability 3/34 · Minimal

Exposure 5/34 · Minimal