CVE-2024-10306: Mod_proxy_cluster: mod_proxy_cluster unauthorized mcmp requests

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-23 · updated 2026-10-21
Weakness: CWE-863

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

Red Hat Enterprise Linux 10: all versions — fixed in 0:1.3.21-1.el10, 0:1.3.22-1.el10_0.2
Red Hat Enterprise Linux 9: all versions — fixed in 0:1.3.22-1.el9_5.2, 0:1.3.22-1.el9_6.1
Red Hat Enterprise Linux 9.4 Extended Update Support: all versions — fixed in 0:1.3.22-1.el9_4.1
Red Hat JBoss Core Services: all versions

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:1.3.21-1.el10, 0:1.3.22-1.el10_0.2; Red Hat Enterprise Linux 9 0:1.3.22-1.el9_5.2, 0:1.3.22-1.el9_6.1; Red Hat Enterprise Linux 9.4 Extended Update Support 0:1.3.22-1.el9_4.1. Check the vendor advisory for mitigations.

References

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