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Fencer Vulns
high 7.5

CVE-2018-14645 json

A flaw was discovered in the HPACK decoder of HAProxy, before 1.8.14, that is used for HTTP/2.

published 2018-09-21 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6543

cvss
7.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.1%
EPSS 3.1% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

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.

Patch / fix

  • haproxy Debian 14, Debian 13, Debian 12 1.8.13-2

debian advisories DEBIAN-CVE-2018-14645

  • haproxy Ubuntu 18.04 LTS 1.8.8-1ubuntu0.2

ubuntu advisories UBUNTU-CVE-2018-14645

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • haproxy openshift 3.10, openshift 3.9 1.8.14-2.el7
  • haproxy18 openshift 3.10, openshift 3.9 1.8.14-2.el7
  • atomic-openshift openshift 3.10 3.10.66-1.git.0.91d1e89.el7
  • atomic-openshift-pod openshift 3.10 3.10.66-1.git.0.91d1e89.el7
  • atomic-openshift-node openshift 3.10 3.10.66-1.git.0.91d1e89.el7
  • atomic-openshift-tests openshift 3.10 3.10.66-1.git.0.91d1e89.el7
  • atomic-openshift-master openshift 3.10 3.10.66-1.git.0.91d1e89.el7
  • atomic-openshift-clients openshift 3.10 3.10.66-1.git.0.91d1e89.el7

red hat advisories RHSA-2018:2709RHSA-2018:2882RHBA-2019:0028

  • haproxy SLE High Availability Extension 15 1.8.14~git0.52e4d43b-3.3.2

suse advisories SUSE-SU-2018:3249-1

  • haproxy openSUSE Tumbleweed 2.4.4+git0.acb1d0bea-1.2

opensuse advisories openSUSE-SU-2024:10839-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-14645 updated cvss 7.5

haproxy: Out-of-bounds read in HPACK decoder

  • Red Hat OpenShift Container Platform 3.9 haproxy 1.8.14-2.el7, haproxy18 1.8.14-2.el7, rubygem-ffi 1.9.25-4.el7_5, atomic-openshift 3.9.60-1.git.0.f8b38ff.el7, openshift-ansible 3.9.60-1.git.0.f0ebfaa.el7, atomic-openshift-pod 3.9.60-1.git.0.f8b38ff.el7, +19 more
    fixed: vendor fix RHBA-2019:0028
  • Red Hat OpenShift Container Platform 3.10 haproxy 1.8.14-2.el7, haproxy18 1.8.14-2.el7
    fixed: vendor fix RHSA-2018:2709
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-haproxy18-haproxy 1.8.4-3.el7, rh-haproxy18-haproxy-syspaths 1.8.4-3.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3) rh-haproxy18-haproxy 1.8.4-3.el7, rh-haproxy18-haproxy-syspaths 1.8.4-3.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-haproxy18-haproxy 1.8.4-3.el7, rh-haproxy18-haproxy-syspaths 1.8.4-3.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-haproxy18-haproxy 1.8.4-3.el7, rh-haproxy18-haproxy-syspaths 1.8.4-3.el7 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-haproxy18-haproxy 1.8.4-3.el7, rh-haproxy18-haproxy-syspaths 1.8.4-3.el7
    fixed: vendor fix RHSA-2018:2882
  • Red Hat Enterprise Linux 6 haproxy Red Hat Enterprise Linux 7 haproxy Red Hat Enterprise Linux 8 haproxy Red Hat OpenShift Container Platform 3.7 haproxy18 Red Hat OpenShift Container Platform 3.10 python-py 1.4.32-2.el7, perl-IO-String 1.08-20.el7, rubygem-ffi 1.9.25-4.el7_5, image-inspector 2.4.0-3.el7, python-setuptools 17.1.1-4.el7, atomic-openshift 3.10.66-1.git.0.91d1e89.el7, +25 more Red Hat OpenShift Container Platform 3.11 haproxy, haproxy18
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.07% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • [UNKNOWN] haproxy

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.