CVE-2018-6335

State: Published
Severity: 7.5 High
Published: Dec 31, 2018
Updated: May 6, 2025
Reserved: Jan 26, 2018

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-400 Denial of Service (CWE-400)

Affected Products

Product	Versions
HHVMFacebook	3.25.3Affected 3.25.0Affected 3.24.7Affected 3.22.0Affected 3.21.11Affected before 3.21.11Affected

References

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

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