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{"affected_release": [{"advisory": "RHSA-2021:4702", "cpe": "cpe:/a:redhat:satellite:6.10::el7", "package": "tfm-rubygem-puma-0:5.3.2-1.el7sat", "product_name": "Red Hat Satellite 6.10 for RHEL 7", "release_date": "2021-11-16T00:00:00Z"}], "bugzilla": {"description": "rubygem-puma: incomplete fix for CVE-2019-16770 allows Denial of Service (DoS)", "id": "1964874", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1964874"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["Puma is a concurrent HTTP 1.1 server for Ruby/Rack applications. The fix for CVE-2019-16770 was incomplete. The original fix only protected existing connections that had already been accepted from having their requests starved by greedy persistent-connections saturating all threads in the same process. However, new connections may still be starved by greedy persistent-connections saturating all threads in all processes in the cluster. A `puma` server which received more concurrent `keep-alive` connections than the server had threads in its threadpool would service only a subset of connections, denying service to the unserved connections. This problem has been fixed in `puma` 4.3.8 and 5.3.1. Setting `queue_requests false` also fixes the issue. This is not advised when using `puma` without a reverse proxy, such as `nginx` or `apache`, because you will open yourself to slow client attacks (e.g. slowloris). The fix is very small and a git patch is available for those using unsupported versions of Puma.", "A flaw was found in rubygem-puma. The fix for CVE-2019-16770 was incomplete. The original fix only protected existing connections that had already been accepted from having their requests starved by greedy persistent-connections saturating all threads in the same process. However, new connections may still be starved by greedy persistent-connections saturating all threads in all processes in the cluster. A `puma` server which received more concurrent `keep-alive` connections than the server had threads in its threadpool would service only a subset of connections, denying service to the unserved connections."], "name": "CVE-2021-29509", "package_state": [{"cpe": "cpe:/a:redhat:cloudforms_managementengine:5", "fix_state": "Will not fix", "package_name": "rubygem-puma", "product_name": "CloudForms Management Engine 5"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Not affected", "package_name": "3scale-amp-backend", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Not affected", "package_name": "3scale-amp-zync", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "system", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:storage:3", "fix_state": "Affected", "package_name": "rubygem-puma", "product_name": "Red Hat Storage 3"}], "public_date": "2021-05-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-29509\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-29509\nhttps://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5"], "statement": "Red Hat CloudForms 5.0 (CFME 5.11) is in the maintenance support phase and we are no longer fixing Medium/Low severity security bugs. Reference: https://access.redhat.com/support/policy/updates/cloudforms", "threat_severity": "Moderate", "upstream_fix": "puma 4.3.8, puma 5.3.1"}