{"id":"CVE-2025-30193","summary":"Denial of service via crafted TCP exchange","details":"In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service.\n\nThe remedy is: upgrade to the patched 1.9.10 version.\n\nA workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting.\n\nWe would like to thank Renaud Allard for bringing this issue to our attention.","modified":"2026-10-22T10:34:53.177555037Z","published":"2025-05-20T11:17:17.378Z","related":["SUSE-SU-2025:01743-1","SUSE-SU-2025:01745-1","SUSE-SU-2025:01792-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30193.json","cna_assigner":"OX","cwe_ids":["CWE-674"]},"references":[{"type":"WEB","url":"https://repo.powerdns.com/"},{"type":"ADVISORY","url":"https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-03.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30193.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30193"},{"type":"PACKAGE","url":"https://github.com/PowerDNS/pdns"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/powerdns/pdns","events":[{"introduced":"0"},{"fixed":"a1ab4e4d0764d2f36eec35f169f81e30281a9b09"}],"database_specific":{"extracted_events":[{"strategy":"InverseAffectedRanges","range":[{"introduced":"0"},{"fixed":"1.9.10"}],"source":"AFFECTED_FIELD"}]}}],"versions":["dnsdist-1.9.9","dnsdist-1.9.8","dnsdist-1.9.7","dnsdist-1.9.6","dnsdist-1.9.5","dnsdist-1.9.4","dnsdist-1.9.3","dnsdist-1.9.2","dnsdist-1.9.1","dnsdist-1.9.0","dnsdist-1.9.0-rc1","auth-4.9.0-alpha1","dnsdist-1.9.0-alpha4","rec-5.1.0-alpha0","rec-5.0.0-beta1","dnsdist-1.9.0-alpha3","dnsdist-1.9.0-alpha2","rec-5.0.0-alpha2","dnsdist-1.9.0-alpha1","rec-5.0.0-alpha1","rec-4.10.0-alpha0","rec-4.9.0-beta1","dnsdist-1.8.0","auth-4.8.0-beta1","rec-4.9.0-alpha1","dnsdist-1.9.0-alpha0","auth-4.8.0-alpha1","dnsdist-1.8.0-rc3","dnsdist-1.8.0-rc2","dnsdist-1.8.0-rc1","rec-4.9.0-alpha0","rec-4.8.0-alpha1","auth-4.8.0-alpha0","rec-4.7.0-beta1","rec-4.7.0-alpha1","auth-4.7.0-alpha1","auth-4.6.0-beta1","dnsdist-1.8.0-alpha0","dnsdist-1.7.0-beta2","rec-4.6.0-beta2","dnsdist-1.7.0-beta1","rec-4.6.0-beta1","rec-4.6.0-alpha2","dnsdist-1.7.0-alpha2","auth-4.6.0-alpha1","rec-4.6.0-alpha1","dnsdist-1.7.0-alpha1","auth-4.5.0-beta1","auth-4.6.0-alpha0","dnsdist-1.6.0","auth-4.5.0-alpha1","dnsdist-1.7.0-alpha0","dnsdist-1.6.0-rc2","dnsdist-1.6.0-rc1","rec-4.6.0-alpha0","dnsdist-1.6.0-alpha3","rec-4.5.0-beta1","rec-4.5.0-alpha3","rec-4.5.0-alpha2","dnsdist-1.6.0-alpha2","dnsdist-1.6.0-alpha1","rec-4.5.0-alpha1","auth-4.5.0-alpha0","auth-4.4.0-beta1","dnsdist-1.6.0-alpha0","auth-4.4.0-alpha3","auth-4.4.0-alpha2","auth-4.4.0-alpha1","dnsdist-1.5.0","rec-4.5.0-alpha0","rec-4.4.0-beta1","rec-4.4.0-alpha2","dnsdist-1.5.0-rc4","dnsdist-1.5.0-rc3","dnsdist-1.5.0-rc2","rec-4.4.0-alpha1","dnsdist-1.5.0-rc1","dnsdist-1.5.0-alpha1","auth-4.3.0-beta2","rec-4.4.0-alpha0","auth-4.4.0-alpha0","auth-4.3.0-beta1","rec-4.3.0-beta1","auth-4.3.0-alpha1","dnsdist-1.4.0","dnsdist-1.4.0-rc5","rec-4.3.0-alpha3","rec-4.3.0-alpha2","dnsdist-1.4.0-rc4","dnsdist-1.4.0-rc3","rec-4.3.0-alpha1","dnsdist-1.4.0-rc2","dnsdist-1.4.0-rc1","auth-4.2.0-rc2","dnsdist-1.4.0-beta1","rec-4.2.0-rc1","rec-4.2.0-beta1","dnsdist-1.4.0-alpha2","dnsdist-1.4.0-alpha1","auth-4.2.0-rc1","dnsdist-1.3.3","auth-4.2.0-beta1","rec-4.2.0-alpha1","auth-4.2.0-alpha1","dnsdist-1.3.2","dnsdist-1.3.1","dnsdist-1.3.0","dnsdist-1.2.0","auth-4.1.0","rec-4.1.0","rec-4.1.0-rc3","auth-4.1.0-rc3","auth-4.1.0-rc2","rec-4.1.0-rc2","rec-4.1.0-rc1","auth-4.1.0-rc1","rec-4.1.0-alpha1","dnsdist-1.1.0","dnsdist-1.1.0-beta2","dnsdist-1.1.0-beta1","rec-4.0.2","rec-4.0.1","auth-4.0.1","rec-4.0.0","auth-4.0.0","auth-4.0.0-rc1","auth-4.0.0-rc2","rec-4.0.0-rc1","rec-4.0.0-beta1","auth-4.0.0-beta1","auth-4.0.0-alpha3","rec-4.0.0-alpha3","dnsdist-1.0.0","dnsdist-1.0.0-beta1","rec-4.0.0-alpha2","auth-4.0.0-alpha2","dnsdist-1.0.0-alpha2","auth-4.0.0-alpha1","rec-4.0.0-alpha1","dnsdist-1.0.0-alpha1","auth-3.4.0","auth-3.4.0-rc2","rec-3.6.0","auth-3.4.0-rc1","rec-3.5","rec-3.5-rc5","rec-3.5-rc4","rec-3.5-rc3","rec-3.5-rc1","auth-3.2-rc4","auth-3.2-rc3","auth-3.2-rc2","auth-3.2-rc1","auth-3.1-rc3","auth-3.1-rc2","auth-3.1-rc1","rec-3.3.1","rec-3.1.4","rec-3.0.1","rec-3-0-1","rec-3.0","rec-3-0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-30193.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}