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TI-2018-14636 Aliases CVE-2018-20615GHSA-w4g5-v736-j48g

An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy…

Priority MEDIUM 40CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 8 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

An out-of-bounds read issue was discovered in the HTTP/2 protocol decoder in HAProxy 1.8.x and 1.9.x through 1.9.0 which can result in a crash. The processing of the PRIORITY flag in a HEADERS frame requires 5 extra bytes, and while these bytes are skipped, the total frame length was not re-checked to make sure they were present in the frame.

Why it matters now

EPSS 0.04459 91st percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 8 fixed, 1 without a fix

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 · 23

CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*1.8.0 – 1.8.19VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:-:*:*:*:*:*:*1.9.0VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev0:*:*:*:*:*:*1.9.0 dev0VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev1:*:*:*:*:*:*1.9.0 dev1VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev10:*:*:*:*:*:*1.9.0 dev10VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev11:*:*:*:*:*:*1.9.0 dev11VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev2:*:*:*:*:*:*1.9.0 dev2VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev3:*:*:*:*:*:*1.9.0 dev3VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev4:*:*:*:*:*:*1.9.0 dev4VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev5:*:*:*:*:*:*1.9.0 dev5VulnerableHAProxy
  • cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* Versions 1.8.0 – 1.8.19 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:-:*:*:*:*:*:* Versions 1.9.0 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev0:*:*:*:*:*:* Versions 1.9.0 dev0 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev1:*:*:*:*:*:* Versions 1.9.0 dev1 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev10:*:*:*:*:*:* Versions 1.9.0 dev10 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev11:*:*:*:*:*:* Versions 1.9.0 dev11 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev2:*:*:*:*:*:* Versions 1.9.0 dev2 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev3:*:*:*:*:*:* Versions 1.9.0 dev3 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev4:*:*:*:*:*:* Versions 1.9.0 dev4 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev5:*:*:*:*:*:* Versions 1.9.0 dev5 Vulnerable ·HAProxy
Show 13 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy:1.9.0:dev6:*:*:*:*:*:*1.9.0 dev6VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev7:*:*:*:*:*:*1.9.0 dev7VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev8:*:*:*:*:*:*1.9.0 dev8VulnerableHAProxy
cpe:2.3:a:haproxy:haproxy:1.9.0:dev9:*:*:*:*:*:*1.9.0 dev9VulnerableHAProxy
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*3.11VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev6:*:*:*:*:*:* Versions 1.9.0 dev6 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev7:*:*:*:*:*:* Versions 1.9.0 dev7 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev8:*:*:*:*:*:* Versions 1.9.0 dev8 Vulnerable ·HAProxy
  • cpe:2.3:a:haproxy:haproxy:1.9.0:dev9:*:*:*:*:*:* Versions 1.9.0 dev9 Vulnerable ·HAProxy
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
  • cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:* Versions 3.11 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2019:0547 Released 2019-03-14 · Red Hat rating Moderate
    OpenShift Container Platform 3.9 haproxy security update
    • Red Hat OpenShift Container Platform 3.9 haproxy-1.8.17-3.el7, haproxy18-1.8.17-3.el7
  • RHSA-2019:0548 Released 2019-03-14 · Red Hat rating Moderate
    OpenShift Container Platform 3.10 haproxy security update
    • Red Hat OpenShift Container Platform 3.10 haproxy-1.8.17-3.el7, haproxy18-1.8.17-3.el7
  • RHSA-2019:0275 Released 2019-02-05 · Red Hat rating Important
    rh-haproxy18-haproxy security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-haproxy18-haproxy-1.8.4-4.el7, rh-haproxy18-haproxy-syspaths-1.8.4-4.el7
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-haproxy18-haproxy-1.8.4-4.el7, rh-haproxy18-haproxy-syspaths-1.8.4-4.el7
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-haproxy18-haproxy-1.8.4-4.el7, rh-haproxy18-haproxy-syspaths-1.8.4-4.el7
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-haproxy18-haproxy-1.8.4-4.el7, rh-haproxy18-haproxy-syspaths-1.8.4-4.el7
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-haproxy18-haproxy-1.8.4-4.el7, rh-haproxy18-haproxy-syspaths-1.8.4-4.el7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenStack Platform 12 (Pike)AffectedNo fix planned: Out of support scope
Red Hat OpenShift Container Platform 3.10Fixed RHSA-2019:0548
Red Hat OpenShift Container Platform 3.11Fixed—
Red Hat OpenShift Container Platform 3.9Fixed RHSA-2019:0547
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:0275
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2019:0275
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2019:0275
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2019:0275
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:0275
Not affected: 7 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat OpenShift Container Platform 3.7
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenStack Platform 13 (Queens)
  • Red Hat OpenStack Platform 14 (Rocky)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-20615
  2. 2026-10-03 Alias added: GHSA-w4g5-v736-j48g

References

Advisory 4

Other 1

Sources

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