PT-2018-17488 · Facebook · Hhvm

Fred Emmott · Published 2018-12-31 · Updated 2025-05-06 · CVE-2018-6340

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions HHVM versions 3.30 and 3.27.4 and earlier

Description The issue allows for an out-of-bounds read using the Memcache::getextendedstats function. To exploit this, an attacker would need control over memcached server hostnames and/or ports.

Recommendations For HHVM versions 3.30 and 3.27.4 and earlier, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2018-6340

Affected Products

Hhvm

References · 9

• https://github.com/facebook/hhvm/commit/4bff3bfbe90d10451e4638c2118d1ad1117bb3e3 · Patch
• https://osv.dev/vulnerability/CVE-2018-6340 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-6340 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-6340 · Security Note
• https://cve.org/CVERecord?id=CVE-2018-6340 · Security Note
• https://ubuntu.com/security/CVE-2018-6340 · Vendor Advisory
• https://t.me/cvenotify/121089 · Telegram Post
• https://hhvm.com/blog/2018/12/18/hhvm-3.30.1.html · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6340 · Note