{"id":"CVE-2025-30194","summary":"Denial of service via crafted DoH exchange","details":"When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash of DNSdist, causing a denial of service.\n\nThe remedy is: upgrade to the patched 1.9.9 version.\n\nA workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version.\n\nWe would like to thank Charles Howes for bringing this issue to our attention.","modified":"2026-08-12T03:51:15.474629042Z","published":"2025-04-29T11:25:47.141Z","related":["SUSE-SU-2025:01743-1","openSUSE-SU-2025:15157-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30194.json","cna_assigner":"OX","cwe_ids":["CWE-416"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/04/29/1"},{"type":"WEB","url":"https://repo.powerdns.com/"},{"type":"WEB","url":"https://www.vicarius.io/vsociety/posts/cve-2025-30194-detection-dnsdist-vulnerability"},{"type":"WEB","url":"https://www.vicarius.io/vsociety/posts/cve-2025-30194-mitigate-dnsdist-vulnerability"},{"type":"ADVISORY","url":"https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30194.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30194"},{"type":"PACKAGE","url":"https://github.com/PowerDNS/pdns"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/powerdns/pdns","events":[{"introduced":"298a9d67fb760a12eabe89164f92fb814572aea8"},{"fixed":"18d1656b232e3d9ed907b8df2257285c12a5ef1d"}],"database_specific":{"extracted_events":[{"introduced":"1.9.0"},{"fixed":"1.9.9"}],"source":"AFFECTED_FIELD"}}],"versions":["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"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-30194.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}