CVE-2018-6335

high

Description

A Malformed h2 frame can cause 'std::out_of_range' exception when parsing priority meta data. This behavior can lead to denial-of-service. This affects all supported versions of HHVM (3.25.2, 3.24.6, and 3.21.10 and below) when using the proxygen server to handle HTTP2 requests.

References

https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html

https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56

Details

Source: Mitre, NVD

Published: 2018-12-31

Updated: 2025-05-06

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.00604