CVE-2018-6340

Published: Dec 31, 2018Modified: Jun 17, 2026

8.1

Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.2 / Impact: 5.9

Source: NVD

Description

The Memcache::getextendedstats function can be used to trigger an out-of-bounds read. Exploiting this issue requires control over memcached server hostnames and/or ports. This affects all supported versions of HHVM (3.30 and 3.27.4 and below).

Affected (2)

Products: Facebook: Hhvm

Facebook

1 product

Hhvm

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Facebook Hhvm	Up to 3.27.4
Facebook Hhvm	Version 3.30

Related CWEs

CWE-125

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (4)

https://github.com/facebook/hhvm/commit/4bff3bfbe90d10451e4638c2118d1ad1117bb3e3

Source: cve-assign@fb.com

PatchThird Party Advisory

https://hhvm.com/blog/2018/12/18/hhvm-3.30.1.html

Source: cve-assign@fb.com

Third Party Advisory

https://github.com/facebook/hhvm/commit/4bff3bfbe90d10451e4638c2118d1ad1117bb3e3

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://hhvm.com/blog/2018/12/18/hhvm-3.30.1.html

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.