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TI-2023-10998 Aliases CVE-2023-25725GHSA-h2p2-w857-329f

HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are…

Priority MEDIUM 54CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Partial Red Hat: 7 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

HAProxy before 2.7.3 may allow a bypass of access control because HTTP/1 headers are inadvertently lost in some situations, aka "request smuggling." The HTTP header parsers in HAProxy may accept empty header field names, which could be used to truncate the list of HTTP headers and thus make some headers disappear after being parsed and processed for HTTP/1.0 and HTTP/1.1. For HTTP/2 and HTTP/3, the impact is limited because the headers disappear before being parsed and processed, as if they had not been sent by the client. The fixed versions are 2.7.3, 2.6.9, 2.5.12, 2.4.22, 2.2.29, and 2.0.31.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.05493 92nd percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 7 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

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

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*before 2.0.31; 2.1.0 to before 2.2.29; 2.3.0 to before 2.4.22; 2.5.0 to before 2.5.12; 2.6.0 to before 2.6.9; 2.7.0 to before 2.7.3VulnerableHAProxy
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* Versions before 2.0.31; 2.1.0 to before 2.2.29; 2.3.0 to before 2.4.22; 2.5.0 to before 2.5.12; 2.6.0 to before 2.6.9; 2.7.0 to before 2.7.3 Vulnerable ·HAProxy
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

Red Hat 6 advisories

  • RHSA-2024:0746 Released 2024-02-08 · Red Hat rating Important
    new container image: rhceph-5.3
    • Red Hat Ceph Storage 5.3 Tools rhceph/rhceph-5-dashboard-rhel8, rhceph/rhceph-haproxy-rhel8
  • RHSA-2023:1325 Released 2023-05-18 · Red Hat rating Important
    OpenShift Container Platform 4.13.0 security update
    • Ironic content for Red Hat OpenShift Container Platform 4.13 python-werkzeug-2.0.3-4.el9, python3-werkzeug-2.0.3-4.el9
    • Red Hat OpenShift Container Platform 4.13 buildah-1:1.29.1-1.rhaos4.13.el9, buildah-tests-1:1.29.1-1.rhaos4.13.el9, cri-o-1.26.3-3.rhaos4.13.git641290e.el9 +27
  • RHSA-2023:1978 Released 2023-04-25 · Red Hat rating Moderate
    haproxy security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) haproxy-2.4.7-2.el9_0.2
Show 3 more Red Hat advisories
  • RHSA-2023:1655 Released 2023-04-12 · Red Hat rating Critical
    OpenShift Container Platform 4.10.56 security update
    • Red Hat OpenShift Container Platform 4.10 haproxy-2.2.19-4.el8, haproxy22-2.2.19-4.el8, jenkins-2-plugins-4.10.1680703106-1.el8 +5
  • RHSA-2023:1696 Released 2023-04-11 · Red Hat rating Moderate
    haproxy security update
    • Red Hat Enterprise Linux AppStream (v. 9) haproxy-2.4.17-3.el9_1.2
  • RHSA-2023:1268 Released 2023-03-21 · Red Hat rating Moderate
    OpenShift Container Platform 4.12.8 security update
    • Red Hat OpenShift Container Platform 4.12 haproxy-2.2.24-3.rhaos4.12.el8, haproxy22-2.2.24-3.rhaos4.12.el8, openshift-4.12.0-202303132316.p0.geab9cc9.assembly.stream.el8 +3

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 3.11AffectedNo fix planned: Out of support scope
Red Hat Ceph Storage 5.3 ToolsFixed RHSA-2024:0746
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:1696
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:1978
Red Hat OpenShift Container Platform 4.10Fixed RHSA-2023:1655
Red Hat OpenShift Container Platform 4.11Fixed—
Red Hat OpenShift Container Platform 4.12Fixed RHSA-2023:1268
Red Hat OpenShift Container Platform 4.13Fixed RHSA-2023:1325
Not affected: 9 products
  • Ironic content for Red Hat OpenShift Container Platform 4.13
  • Red Hat Ceph Storage 5.3 Tools
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat OpenShift Container Platform 4.10
  • Red Hat OpenShift Container Platform 4.11
  • Red Hat OpenShift Container Platform 4.12
  • Red Hat OpenShift Container Platform 4.13
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-25725
  2. 2026-10-03 Alias added: GHSA-h2p2-w857-329f

References

Advisory 4

Other 2

Sources

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