CVE-2018-6335 Information

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.

CVSS Vector

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

Reference

https://github.com/facebook/hhvm/commit/4cb57dd753a339654ca464c139db9871fe961d56 https://hhvm.com/blog/2018/05/04/hhvm-3.25.3.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5