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Accepted unbound 1.9.0-2+deb10u3 (source) into oldstable

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Hash: SHA512

Format: 1.8
Date: Wed, 29 Mar 2023 10:57:23 CEST
Source: unbound
Architecture: source
Version: 1.9.0-2+deb10u3
Distribution: buster-security
Urgency: high
Maintainer: unbound packagers <unbound@packages.debian.org>
Changed-By: Markus Koschany <apo@debian.org>
Checksums-Sha1:
 261f6a353ffe9495cff0b90d656890704e9aa3c9 3209 unbound_1.9.0-2+deb10u3.dsc
 7e5634216ecffd79f192f579d66916ffd4c2d2b8 35720 unbound_1.9.0-2+deb10u3.debian.tar.xz
 51de90d5fd6bfef833badd9be8de1f2e668950bd 11484 unbound_1.9.0-2+deb10u3_amd64.buildinfo
Checksums-Sha256:
 9d7e5f6590cdb52cda3d1f11c2a243ee4033370651dfe1dbca5716e217ca4bf6 3209 unbound_1.9.0-2+deb10u3.dsc
 b8d43f47f38cc6cd891f99b170d0a372df695400a7eaa5b8702477c8f0682f0f 35720 unbound_1.9.0-2+deb10u3.debian.tar.xz
 68af9d45874b5b7c7a962b87a13996a0005e5cc44140e23dba732dbc9dd5b00e 11484 unbound_1.9.0-2+deb10u3_amd64.buildinfo
Changes:
 unbound (1.9.0-2+deb10u3) buster-security; urgency=high
 .
   * Non-maintainer upload by the LTS team.
   * Fix 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.
   * Fix CVE-2022-30698 and CVE-2022-30699:
     NLnet Labs 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.
   * Fix CVE-2020-28935:
     Unbound contains a local vulnerability that would allow for a local symlink
     attack. When writing the PID file Unbound creates the file if it is not
     there, or opens an existing file for writing. In case the file was already
     present, it would follow symlinks if the file happened to be a symlink
     instead of a regular file.
Files:
 5e20d9806a2ce9be4e41ee8f4fc09ac3 3209 net optional unbound_1.9.0-2+deb10u3.dsc
 1780a70d9b191ac2af60e1bd31783c18 35720 net optional unbound_1.9.0-2+deb10u3.debian.tar.xz
 dce5c64d60a113416f15bd5c84fa6b68 11484 net optional unbound_1.9.0-2+deb10u3_amd64.buildinfo

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