Description
A vulnerability was found in mod_proxy_cluster. The issue is that the <Directory> directive should be replaced by the <Location> directive as the former does not restrict IP/host access as `Require ip IP_ADDRESS` would suggest. This means that anyone with access to the host might send MCMP requests that may result in adding/removing/updating nodes for the balancing. However, this host should not be accessible to the public network as it does not serve the general traffic.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | mod_proxy_cluster | 1.3.17 – < 1.3.21.Final | 1.3.21.Final |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | — |
| Red Hat | Red Hat JBoss Core Services 2.4.62 | — | — |
| Red Hat | Red Hat JBoss Core Services | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | mod_proxy_cluster | 1.3.21-1.el10 | RHSA-2025:9466, RHBA-2025:5309 |
| RHEL 9 | mod_proxy_cluster | 1.3.22-1.el9_5.2 | RHSA-2025:9434, RHBA-2025:2973 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | mod_proxy_cluster | 1.3.22-1.el9_4.1 | RHSA-2025:9997 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | mod_proxy_cluster | 1.3.22-1.el10_0.2 | ALSA-2025:9466 |
| AlmaLinux 9 | mod_proxy_cluster | 1.3.22-1.el9_6.1 | ALSA-2025:9434 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | mod_proxy_cluster | 1.3.22-1.el10_0.2 | RLSA-2025:9466 |
| Rocky Linux 9 | mod_proxy_cluster | 1.3.22-1.el9_6.1 | RLSA-2025:9434 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | mod_proxy_cluster | 1.3.22-1.el10_0.2 | ELSA-2025-9466 |
| Oracle Linux 9 | mod_proxy_cluster | 1.3.22-1.el9_6.1 | ELSA-2025-9434 |
Advisories 12
- ALSA-2025:9466 Moderate: mod_proxy_cluster security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:9434 Moderate: mod_proxy_cluster security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:9997 Red Hat Security Advisory: mod_proxy_cluster security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHSA-2025:9434 Red Hat Security Advisory: mod_proxy_cluster security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHSA-2025:9466 Red Hat Security Advisory: mod_proxy_cluster security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHBA-2025:5309 Red Hat Bug Fix Advisory: mod_proxy_cluster bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHBA-2025:2973 Red Hat Bug Fix Advisory: mod_proxy_cluster bug fix update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RLSA-2025:9434 Moderate: mod_proxy_cluster security update Rocky Linux Security Advisories · Oct 7, 2025
- RLSA-2025:9466 Moderate: mod_proxy_cluster security update Rocky Linux Security Advisories · Oct 3, 2025
- WID-SEC-2025-1378 Red Hat Enterprise Linux (mod_proxy_cluster): Schwachstelle ermöglicht Manipulation von Daten BSI CERT-Bund (WID) · Jun 30, 2025
- ELSA-2025-9466 Moderate: mod_proxy_cluster security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jun 27, 2025
- ELSA-2025-9434 Moderate: mod_proxy_cluster security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 24, 2025
References
- RHBA-2025:2973 vendor-advisory
- RHBA-2025:5309 vendor-advisory
- RHSA-2025:3453 vendor-advisory
- RHSA-2025:9434 vendor-advisory
- RHSA-2025:9466 vendor-advisory
- RHSA-2025:9997 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2024-10306 vdb-entry
- RHBZ#2321302 issue-tracking
- https://github.com/modcluster/mod_proxy_cluster/pull/309