An update for bind is now available for openEuler-20.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2025-2609 Final 1.0 1.0 2025-10-31 Initial 2025-10-31 2025-10-31 openEuler SA Tool V1.0 2025-10-31 bind security update An update for bind is now available for openEuler-20.03-LTS-SP4 Berkeley Internet Name Domain (BIND) is an implementation of the Domain Name System (DNS) protocols and provides an openly redistributable reference implementation of the major components of the Domain Name System. This package includes the components to operate a DNS server. Security Fix(es): Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.(CVE-2023-50387) The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.(CVE-2023-50868) An update for bind is now available for openEuler-20.03-LTS-SP4. 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 bind https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2609 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2023-50387 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2023-50868 https://nvd.nist.gov/vuln/detail/CVE-2023-50387 https://nvd.nist.gov/vuln/detail/CVE-2023-50868 openEuler-20.03-LTS-SP4 bind-9.11.21-21.oe2003sp4.aarch64.rpm bind-chroot-9.11.21-21.oe2003sp4.aarch64.rpm bind-debuginfo-9.11.21-21.oe2003sp4.aarch64.rpm bind-debugsource-9.11.21-21.oe2003sp4.aarch64.rpm bind-devel-9.11.21-21.oe2003sp4.aarch64.rpm bind-export-devel-9.11.21-21.oe2003sp4.aarch64.rpm bind-export-libs-9.11.21-21.oe2003sp4.aarch64.rpm bind-libs-9.11.21-21.oe2003sp4.aarch64.rpm bind-libs-lite-9.11.21-21.oe2003sp4.aarch64.rpm bind-pkcs11-9.11.21-21.oe2003sp4.aarch64.rpm bind-pkcs11-devel-9.11.21-21.oe2003sp4.aarch64.rpm bind-utils-9.11.21-21.oe2003sp4.aarch64.rpm bind-9.11.21-21.oe2003sp4.src.rpm bind-9.11.21-21.oe2003sp4.x86_64.rpm bind-chroot-9.11.21-21.oe2003sp4.x86_64.rpm bind-debuginfo-9.11.21-21.oe2003sp4.x86_64.rpm bind-debugsource-9.11.21-21.oe2003sp4.x86_64.rpm bind-devel-9.11.21-21.oe2003sp4.x86_64.rpm bind-export-devel-9.11.21-21.oe2003sp4.x86_64.rpm bind-export-libs-9.11.21-21.oe2003sp4.x86_64.rpm bind-libs-9.11.21-21.oe2003sp4.x86_64.rpm bind-libs-lite-9.11.21-21.oe2003sp4.x86_64.rpm bind-pkcs11-9.11.21-21.oe2003sp4.x86_64.rpm bind-pkcs11-devel-9.11.21-21.oe2003sp4.x86_64.rpm bind-utils-9.11.21-21.oe2003sp4.x86_64.rpm python3-bind-9.11.21-21.oe2003sp4.noarch.rpm Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records. 2025-10-31 CVE-2023-50387 openEuler-20.03-LTS-SP4 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H bind security update 2025-10-31 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2609 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations. 2025-10-31 CVE-2023-50868 openEuler-20.03-LTS-SP4 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H bind security update 2025-10-31 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2609