The pcs packages for Red Hat Enterprise Linux provide command-line configuration for Pacemaker and Corosync. This advisory fixes three denial of service vulnerabilities in the rubygem-rack dependency: CVE-2024-25126 (Content-Type parsing), CVE-2024-26141 (Range header handling), and CVE-2024-26146 (header parsing). These vulnerabilities could allow an attacker to cause a denial of service condition via crafted HTTP headers processed by Rack. Red Hat has released updated pcs packages in RHEL 8.10 that address these issues. The advisory also includes other pcs-related fixes and improvements. No CVSS scores are provided in the advisory, but the impact is rated moderate by Red Hat Product Security.

The vulnerabilities allow denial of service attacks against applications using rubygem-rack, which could disrupt the availability of the pcs configuration system for Pacemaker and Corosync clusters. This could affect cluster management and high availability operations on affected Red Hat Enterprise Linux 8 systems. No known exploits in the wild have been reported at this time.

Red Hat has released updated pcs packages in Red Hat Enterprise Linux 8.10 that fix these vulnerabilities. Users should apply the official update as described in the Red Hat advisory RHSA-2024:2953 and the linked update instructions (https://access.redhat.com/articles/11258). Applying this update will remediate the denial of service vulnerabilities in rubygem-rack. No additional mitigation steps are indicated by the vendor.