CVE-2018-14645

Publication date 21 September 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was discovered in the HPACK decoder of HAProxy, before 1.8.14, that is used for HTTP/2. An out-of-bounds read access in hpack_valid_idx() resulted in a remote crash and denial of service.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
haproxy	18.04 LTS bionic	Fixed 1.8.8-1ubuntu0.2
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Notes

leosilva

only affected 1.8.x.

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3780-1
HAProxy vulnerability
2 October 2018