注： 1. 本公告所涉及的漏洞修复信息知识产权全部归麒麟软件有限公司所有，此安全漏洞补丁公告仅适用于麒麟软件操作系统通用主线产品，定制、OEM等版本可根据需要联系售后获取支持。任何媒体、网站或个人转载使用时不得进行商业性的原版原式的转载，也不得歪曲和篡改所发布的内容。此声明以及其修改权、更新权及最终解释权均归本网所有。 2. 此安全漏洞补丁公告仅适用于银河麒麟桌面操作系统V10 SP1 2403版本，系统版本查询工具下载链接： https://security-oss.kylinos.cn/Desktop/libkysdk-sysinfo.zip 1. 漏洞概述 CVE-2023-50868 Knot Resolver是一款缓存DNS解析器实现，它包括解析器库和守护程序。Knot Resolver 5.7.1之前版本存在安全漏洞，该漏洞源于允许远程攻击者通过随机子域攻击造成拒绝服务。 CVE-2023-50387 DNS协议的某些DNSSEC方面（在RFC 4033、4034、4035、6840和相关RFC中）允许远程攻击者通过一个或多个DNSSEC响应造成拒绝服务（CPU消耗），即“KeyTrap”问题。其中一个问题是，当有一个区域有许多DNSKEY和RRSIG记录时，协议规范意味着算法必须评估DNSKEY和RRAIG记录的所有组合。 2. 受影响的操作系统及软件包 ·银河麒麟桌面操作系统V10 SP1 2403 x86_64 架构： libunbound8、python-unbound、python3-unbound、unbound-anchor、unbound-host、unbound arm64 架构： libunbound8、python-unbound、python3-unbound、unbound-anchor、unbound-host、unbound mips64el 架构： libunbound8、python-unbound、python3-unbound、unbound-anchor、unbound-host、unbound loongarch64 架构： libunbound8、python-unbound、python3-unbound、unbound-anchor、unbound-host、unbound 3. 软件包修复版本 ·银河麒麟桌面操作系统V10 SP1 2403 1.9.4-2kylin1.5 4. 修复方法 方法一：升级安装 执行更新命令进行升级 $sudo apt update $sudo apt install unbound 方法二：下载软件包进行升级安装 通过软件包地址下载软件包，使用软件包升级命令根据受影响的软件包列表升级相关的组件包。 $sudo apt-get install /Path1/Package1 /Path2/Package2 /Path3/Package3…… 注：Path 指软件包下载到本地的路径，Package指下载的软件包名称，多个软件包则以空格分开。 5. 软件包下载地址 银河麒麟桌面操作系统V10 SP1 2403 x86_64软件包下载地址 https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/libunbound8_1.9.4-2kylin1.5_amd64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python-unbound_1.9.4-2kylin1.5_amd64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python3-unbound_1.9.4-2kylin1.5_amd64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-anchor_1.9.4-2kylin1.5_amd64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-host_1.9.4-2kylin1.5_amd64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound_1.9.4-2kylin1.5_amd64.deb arm64软件包下载地址 https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/libunbound8_1.9.4-2kylin1.5_arm64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python-unbound_1.9.4-2kylin1.5_arm64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python3-unbound_1.9.4-2kylin1.5_arm64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-anchor_1.9.4-2kylin1.5_arm64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-host_1.9.4-2kylin1.5_arm64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound_1.9.4-2kylin1.5_arm64.deb mips64el软件包下载地址 https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/libunbound8_1.9.4-2kylin1.5_mips64el.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python-unbound_1.9.4-2kylin1.5_mips64el.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python3-unbound_1.9.4-2kylin1.5_mips64el.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-anchor_1.9.4-2kylin1.5_mips64el.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-host_1.9.4-2kylin1.5_mips64el.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound_1.9.4-2kylin1.5_mips64el.deb loongarch64软件包下载地址 https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/libunbound8_1.9.4-2kylin1.5_loongarch64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python-unbound_1.9.4-2kylin1.5_loongarch64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/python3-unbound_1.9.4-2kylin1.5_loongarch64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-anchor_1.9.4-2kylin1.5_loongarch64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound-host_1.9.4-2kylin1.5_loongarch64.deb https://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/u/unbound/unbound_1.9.4-2kylin1.5_loongarch64.deb 注：软件包仅适用于银河麒麟桌面操作系统V10 SP1 2403版本。 6. 修复验证 使用软件包查询命令，查看相关的软件包版本大于或等于修复版本则成功修复。 $sudo dpkg -l |grep Package 注：Package为软件包包名。