Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic. This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1.
{ "availability": "No subscription required", "binaries": [ { "binary_name": "bind9", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-dnsutils", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-dnsutils-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-doc", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-host", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-host-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-libs", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-libs-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-utils", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9-utils-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "bind9utils", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" }, { "binary_name": "dnsutils", "binary_version": "1:9.18.30-0ubuntu0.20.04.2" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "bind9", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-dev", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-dnsutils", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-dnsutils-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-doc", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-host", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-host-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-libs", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-libs-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-utils", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9-utils-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "bind9utils", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" }, { "binary_name": "dnsutils", "binary_version": "1:9.18.30-0ubuntu0.22.04.2" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "bind9", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-dev", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-dnsutils", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-dnsutils-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-doc", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-host", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-host-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-libs", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-libs-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-utils", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9-utils-dbgsym", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "bind9utils", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" }, { "binary_name": "dnsutils", "binary_version": "1:9.18.30-0ubuntu0.24.04.2" } ] }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "bind9", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-dbgsym", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-dev", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-dnsutils", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-dnsutils-dbgsym", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-doc", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-host", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-host-dbgsym", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-libs", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-libs-dbgsym", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-utils", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9-utils-dbgsym", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "bind9utils", "binary_version": "1:9.20.0-2ubuntu4" }, { "binary_name": "dnsutils", "binary_version": "1:9.20.0-2ubuntu4" } ] }