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TI-2020-08973 Aliases CVE-2020-11100GHSA-3xcv-57q9-hrj2

In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before…

Priority HIGH 73CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location on the heap via a crafted HTTP/2 request, possibly causing remote code execution.

Why it matters now

EPSS 0.61593 99th percentileScored 2026-11-07
Fix Fixed Red Hat: 5 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 9

CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*1.8.0 to before 2.1.4VulnerableHAProxy
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*3.11VulnerableRed Hat
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*30VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*19.10VulnerableCanonical
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* Versions 1.8.0 to before 2.1.4 Vulnerable ·HAProxy
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:* Versions 3.11 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Canonical
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

Red Hat 5 advisories

  • RHSA-2020:1936 Released 2020-05-04 · Red Hat rating Moderate
    OpenShift Container Platform 4.4.3 haproxy security update
    • Red Hat OpenShift Container Platform 4.4 haproxy-2.0.13-3.el7, haproxy-2.0.13-3.el8, haproxy20-2.0.13-3.el7 +1
  • RHSA-2020:1287 Released 2020-04-07 · Red Hat rating Critical
    OpenShift Container Platform 3.11 security update
    • Red Hat OpenShift Container Platform 3.11 haproxy-1.8.23-3.el7, haproxy18-1.8.23-3.el7
  • RHSA-2020:1288 Released 2020-04-02 · Red Hat rating Critical
    haproxy security update
    • Red Hat Enterprise Linux AppStream (v. 8) haproxy-1.8.15-6.el8_1.1
Show 2 more Red Hat advisories
  • RHSA-2020:1290 Released 2020-04-02 · Red Hat rating Critical
    rh-haproxy18-haproxy security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-haproxy18-haproxy-1.8.17-1.el7.1, rh-haproxy18-haproxy-syspaths-1.8.17-1.el7.1
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-haproxy18-haproxy-1.8.17-1.el7.1, rh-haproxy18-haproxy-syspaths-1.8.17-1.el7.1
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-haproxy18-haproxy-1.8.17-1.el7.1, rh-haproxy18-haproxy-syspaths-1.8.17-1.el7.1
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-haproxy18-haproxy-1.8.17-1.el7.1, rh-haproxy18-haproxy-syspaths-1.8.17-1.el7.1
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-haproxy18-haproxy-1.8.17-1.el7.1, rh-haproxy18-haproxy-syspaths-1.8.17-1.el7.1
  • RHSA-2020:1289 Released 2020-04-02 · Red Hat rating Critical
    haproxy security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.0) haproxy-1.8.15-5.el8_0.1

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:1288
Red Hat Enterprise Linux AppStream E4S (v. 8.0)Fixed RHSA-2020:1289
Red Hat OpenShift Container Platform 3.11Fixed RHSA-2020:1287
Red Hat OpenShift Container Platform 4.4Fixed RHSA-2020:1936
Red Hat OpenShift Container Platform 4.5Fixed—
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:1290
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2020:1290
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:1290
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7)Fixed RHSA-2020:1290
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:1290
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-11100
  2. 2026-10-03 Alias added: GHSA-3xcv-57q9-hrj2
  3. 2026-10-30 Fix available: Red Hat OpenShift Container Platform 4.5 · Red Hat

References

Advisory 12

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences