-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Format: 1.8 Date: Wed, 5 Apr 2023 23:28:30 CEST Source: unbound Architecture: source Version: 1.13.1-1+deb11u1 Distribution: bullseye Urgency: high Maintainer: unbound packagers <unbound@packages.debian.org> Changed-By: Markus Koschany <apo@debian.org> Checksums-Sha1: 191fd7c45fb36719f4921b7277734179c344d7fd 3194 unbound_1.13.1-1+deb11u1.dsc 61326196013301cbfe56adc0010fd898eac39f2e 29448 unbound_1.13.1-1+deb11u1.debian.tar.xz ba48e86e51f38f835e7001fe28f90421371e846c 10987 unbound_1.13.1-1+deb11u1_amd64.buildinfo Checksums-Sha256: af4c16c1dcdb4ddbb60fc7fa2fe927d1e80551dfb60cc19f75adcece33a0f76c 3194 unbound_1.13.1-1+deb11u1.dsc 0e47998afdcb29066c559031c374a3d8eb5b7a7e850a7e347b89304882fcf859 29448 unbound_1.13.1-1+deb11u1.debian.tar.xz 80f007700d9a79c999edeb9426254df462fad91d9cefb2f5337e8d7054268ca9 10987 unbound_1.13.1-1+deb11u1_amd64.buildinfo Closes: 1016493 Changes: unbound (1.13.1-1+deb11u1) bullseye; urgency=high . * Non-maintainer upload by the LTS team. * Fix the following security vulnerabilities. CVE-2022-3204: A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software. The NRDelegation Attack works by having a malicious delegation with a considerable number of non responsive nameservers. The attack starts by querying a resolver for a record that relies on those unresponsive nameservers. The attack can cause a resolver to spend a lot of time/resources resolving records under a malicious delegation point where a considerable number of unresponsive NS records reside. It can trigger high CPU usage in some resolver implementations that continually look in the cache for resolved NS records in that delegation. This can lead to degraded performance and eventually denial of service in orchestrated attacks. Unbound does not suffer from high CPU usage, but resources are still needed for resolving the malicious delegation. Unbound will keep trying to resolve the record until hard limits are reached. Based on the nature of the attack and the replies, different limits could be reached. From now on Unbound introduces fixes for better performance when under load, by cutting opportunistic queries for nameserver discovery and DNSKEY prefetching and limiting the number of times a delegation point can issue a cache lookup for missing records. * CVE-2022-30698 and CVE-2022-30699: (Closes: #1016493) Unbound is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From now on Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten. Files: 4e632aaa127d4afb9f1e271e95b9a956 3194 net optional unbound_1.13.1-1+deb11u1.dsc 909796ba0ad4233b21a3ba7ae60788a3 29448 net optional unbound_1.13.1-1+deb11u1.debian.tar.xz 6b19abbdb5f00a0fbaa467e769109831 10987 net optional unbound_1.13.1-1+deb11u1_amd64.buildinfo -----BEGIN PGP SIGNATURE----- iQKjBAEBCgCNFiEErPPQiO8y7e9qGoNf2a0UuVE7UeQFAmQt6KpfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEFD RjNEMDg4RUYzMkVERUY2QTFBODM1RkQ5QUQxNEI5NTEzQjUxRTQPHGFwb0BkZWJp YW4ub3JnAAoJENmtFLlRO1HkmCMP/Ri8XSC9KQi3MaMpYaLr+3wc82LeOGzBJxMg b96oSNYfaiH3g0NijlAEeAoW42nZKZLmL1Y+RHYSro4Nr6ZFbuOMFBJaMA5Dnp9I vhc4bnUIo+vS3OFE7lj5n27xYpErsx2RGIJspt5Pdyg8Bi862OgGtpwzD3J0a+lx NhkTwBuWA4DN0wVW8SoP8ghrefrJVAQunEABiLjnWAAZwMQE8QiHBHn7jQaBCFuP a1FBp/o6f0HtxZnKIEazPg3tyqrPg/LTdoVVbxGAfxKqeLAIn4zFLKKo2FuhhfhR GBXyYq8JAYCqXEnVcPZABgV6WPbzAowibyxNpNHOb7sjrZ07RfGUYMN9z9QIhaTi GWH++Rjj/AJvT4cDiAomec0gnmdUa/+OV302jRpdjGPqaK/YuHB/TiUYt3vOSoiN 5ynRCJnmNpOf6iMCq289zDHZZ/bpQA4bHE4cc44YnoSNhEtJ+FPh5hEsat5zsKt+ YaWjWBiHeLk9qjU8kLPFyVYw1oiOWdNNsJ4zTAaZOsgfAv3UJrGBFu8yGJm+VM/T 3+KFaIHxmuINepp6+S+TAtdEY/2okxp0apRYYcD+ut6KPYyuMgXyRAJ1OtxhpNjy kDRrw2lqBdfsvdb4v7RsbrG1gtVBZGCANkT0/np53D4jCyx8nx9h0UCfb9ISJpTT BEwrNzqn =/WbR -----END PGP SIGNATURE-----
