{"id":"UBUNTU-CVE-2025-30194","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. The remedy is: upgrade to the patched 1.9.9 version. A workaround is to temporarily switch to the h2o provider until DNSdist has been upgraded to a fixed version. We would like to thank Charles Howes for bringing this issue to our attention.","modified":"2026-02-10T08:07:45.733463Z","published":"2025-04-29T12:15:00Z","withdrawn":"2026-02-10T05:23:15Z","upstream":["CVE-2025-30194"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-30194"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-30194"},{"type":"REPORT","url":"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html"},{"type":"REPORT","url":"https://github.com/PowerDNS/pdns/issues/15475"},{"type":"REPORT","url":"https://github.com/PowerDNS/pdns/pull/15482"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2025/04/29/1"},{"type":"REPORT","url":"https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-02.html"}],"affected":[{"package":{"name":"dnsdist","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/dnsdist@1.0.0~alpha2-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~alpha2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsdist","binary_version":"1.0.0~alpha2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30194.json"}},{"package":{"name":"dnsdist","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/dnsdist@1.2.1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.0-1","1.2.0-3","1.2.1-1","1.2.1-1build1","1.2.1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsdist","binary_version":"1.2.1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30194.json"}},{"package":{"name":"dnsdist","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/dnsdist@1.4.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.0~rc3-1","1.4.0-1","1.4.0-1build1","1.4.0-1build2","1.4.0-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsdist","binary_version":"1.4.0-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30194.json"}},{"package":{"name":"dnsdist","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/dnsdist@1.6.1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.1-3build2","1.6.1-1build1","1.6.1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsdist","binary_version":"1.6.1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30194.json"}},{"package":{"name":"dnsdist","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/dnsdist@1.8.3-2build2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.0-1","1.8.2-1","1.8.2-2","1.8.2-3","1.8.3-1","1.8.3-2","1.8.3-2build1","1.8.3-2build2"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsdist","binary_version":"1.8.3-2build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30194.json"}},{"package":{"name":"dnsdist","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/dnsdist@1.9.10-1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.8-1","1.9.10-1"],"ecosystem_specific":{"binaries":[{"binary_name":"dnsdist","binary_version":"1.9.10-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-30194.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}