An update for unbound is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and openEuler-22.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2022-1972 Final 1.0 1.0 2022-09-30 Initial 2022-09-30 2022-09-30 openEuler SA Tool V1.0 2022-09-30 unbound security update An update for unbound is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and openEuler-22.03-LTS. Security Fix(es): 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 version 1.16.3 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-2022-3204) An update for unbound is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and openEuler-22.03-LTS. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High unbound https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1972 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2022-3204 https://nvd.nist.gov/vuln/detail/CVE-2022-3204 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS unbound-help-1.11.0-9.oe1.aarch64.rpm unbound-libs-1.11.0-9.oe1.aarch64.rpm unbound-1.11.0-9.oe1.aarch64.rpm python3-unbound-1.11.0-9.oe1.aarch64.rpm unbound-debugsource-1.11.0-9.oe1.aarch64.rpm unbound-devel-1.11.0-9.oe1.aarch64.rpm unbound-debuginfo-1.11.0-9.oe1.aarch64.rpm unbound-debuginfo-1.11.0-8.oe1.aarch64.rpm unbound-devel-1.11.0-8.oe1.aarch64.rpm python3-unbound-1.11.0-8.oe1.aarch64.rpm unbound-help-1.11.0-8.oe1.aarch64.rpm unbound-debugsource-1.11.0-8.oe1.aarch64.rpm unbound-1.11.0-8.oe1.aarch64.rpm unbound-libs-1.11.0-8.oe1.aarch64.rpm unbound-libs-1.13.2-6.oe2203.aarch64.rpm unbound-debuginfo-1.13.2-6.oe2203.aarch64.rpm unbound-1.13.2-6.oe2203.aarch64.rpm unbound-debugsource-1.13.2-6.oe2203.aarch64.rpm unbound-help-1.13.2-6.oe2203.aarch64.rpm unbound-devel-1.13.2-6.oe2203.aarch64.rpm python3-unbound-1.13.2-6.oe2203.aarch64.rpm unbound-1.11.0-9.oe1.src.rpm unbound-1.11.0-8.oe1.src.rpm unbound-1.13.2-6.oe2203.src.rpm python3-unbound-1.11.0-9.oe1.x86_64.rpm unbound-1.11.0-9.oe1.x86_64.rpm unbound-libs-1.11.0-9.oe1.x86_64.rpm unbound-help-1.11.0-9.oe1.x86_64.rpm unbound-devel-1.11.0-9.oe1.x86_64.rpm unbound-debuginfo-1.11.0-9.oe1.x86_64.rpm unbound-debugsource-1.11.0-9.oe1.x86_64.rpm unbound-debuginfo-1.11.0-8.oe1.x86_64.rpm unbound-debugsource-1.11.0-8.oe1.x86_64.rpm unbound-help-1.11.0-8.oe1.x86_64.rpm unbound-libs-1.11.0-8.oe1.x86_64.rpm unbound-devel-1.11.0-8.oe1.x86_64.rpm python3-unbound-1.11.0-8.oe1.x86_64.rpm unbound-1.11.0-8.oe1.x86_64.rpm python3-unbound-1.13.2-6.oe2203.x86_64.rpm unbound-help-1.13.2-6.oe2203.x86_64.rpm unbound-debugsource-1.13.2-6.oe2203.x86_64.rpm unbound-1.13.2-6.oe2203.x86_64.rpm unbound-devel-1.13.2-6.oe2203.x86_64.rpm unbound-debuginfo-1.13.2-6.oe2203.x86_64.rpm unbound-libs-1.13.2-6.oe2203.x86_64.rpm 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 version 1.16.3 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. 2022-09-30 CVE-2022-3204 openEuler-20.03-LTS-SP1 openEuler-20.03-LTS-SP3 openEuler-22.03-LTS High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H unbound security update 2022-09-30 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1972