CVE-2019-18277

mediumpriority · track · 34EPSS 0.101 · 96 %ileDEEURUUS
grimoire priorityP1 · Urgent
Exploitable?
—
no known exploitation
Likely / severe?
10.1% (96th) EPSS
CVSS 4.3 · medium
Is it mine?
22 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the "chunked" value were not being correctly rejected. The impact was limited but if combined with the "http-reuse always" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedhaproxy-0:1.8.23-3.el7.src as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    Before applying this update, ensure all previously released errata relevant to your system is applied. See the following documentation, which will be updated shortly for release 3.11.200, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258.

    https://access.redhat.com/errata/RHSA-2020:1287
  • Fixedhaproxy-debuginfo-0:1.8.23-3.el7.ppc64le as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    Before applying this update, ensure all previously released errata relevant to your system is applied. See the following documentation, which will be updated shortly for release 3.11.200, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258.

    https://access.redhat.com/errata/RHSA-2020:1287
  • Fixedhaproxy-debuginfo-0:1.8.23-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    Before applying this update, ensure all previously released errata relevant to your system is applied. See the following documentation, which will be updated shortly for release 3.11.200, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258.

    https://access.redhat.com/errata/RHSA-2020:1287
  • Fixedhaproxy18-0:1.8.23-3.el7.ppc64le as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    Before applying this update, ensure all previously released errata relevant to your system is applied. See the following documentation, which will be updated shortly for release 3.11.200, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258.

    https://access.redhat.com/errata/RHSA-2020:1287
  • Fixedhaproxy18-0:1.8.23-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    Before applying this update, ensure all previously released errata relevant to your system is applied. See the following documentation, which will be updated shortly for release 3.11.200, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/3.11/release_notes/ocp_3_11_release_notes.html This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258.

    https://access.redhat.com/errata/RHSA-2020:1287
  • Fixedhaproxy-0:2.0.13-3.el7.src as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Fixedhaproxy-0:2.0.13-3.el8.src as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Fixedhaproxy-debuginfo-0:2.0.13-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Fixedhaproxy-debugsource-0:2.0.13-3.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Fixedhaproxy20-0:2.0.13-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Fixedhaproxy20-0:2.0.13-3.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Fixedhaproxy20-debuginfo-0:2.0.13-3.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for release 4.4.3, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.

    https://access.redhat.com/errata/RHSA-2020:1936
  • Workaroundhaproxy-0:1.8.23-3.el7.src as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy-debuginfo-0:1.8.23-3.el7.ppc64le as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy-debuginfo-0:1.8.23-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy18-0:1.8.23-3.el7.ppc64le as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy18-0:1.8.23-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 3.11redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy-0:2.0.13-3.el7.src as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy-0:2.0.13-3.el8.src as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy-debuginfo-0:2.0.13-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy-debugsource-0:2.0.13-3.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy20-0:2.0.13-3.el7.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy20-0:2.0.13-3.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

  • Workaroundhaproxy20-debuginfo-0:2.0.13-3.el8.x86_64 as a component of Red Hat OpenShift Container Platform 4.4redhat_csaf

    - Reconsider the use of `http-reuse always` if possible - Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend - Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers

02

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.5

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.06.5mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:Lsecondary · Red Hat Product Security US
v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USprimaryCWE-444USCWE-444US
04

affected products (22)

Products and version ranges known to be affected.

showing 20 of 22
05

advisories (3)

Vendor and ecosystem advisories describing this.

  • RHSA-2020:1287Red Hat Security Advisory: OpenShift Container Platform 3.11 security update2020-04-07csaf · redhat_csafUS

    Red Hat OpenShift Container Platform release 3.11.200 is now available with updates to packages and images that fix several bugs. Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • RHSA-2020:1936Red Hat Security Advisory: OpenShift Container Platform 4.4.3 haproxy security update2020-05-04csaf · redhat_csafUS

    An update for haproxy is now available for Red Hat OpenShift Container Platform 4.4. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  • WID-SEC-W-2024-0054IBM Security Verify Access: Mehrere SchwachstellenDeutsch2024-01-09csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern oder komplexe Angriffe wie Cache Poisoning, Cross-Site-Scripting oder Session-Hijacking durchzuführen.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdredhat_csafNVDCVE.orgMITRE
published 2019-10-23modified 2026-06-17
09

references (40)

External citations — patches, advisories, analysis.

scry

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