1.修復的CVE ·CVE-2018-20217 描述：在1.17之前的MIT Kerberos 5（aka krb5）的KDC中發現了一個可訪問的斷言問題。如果攻擊者可以使用較舊的加密類型（single DES、triple DES或RC4）獲取krbtgt票證，則攻擊者可以通過發出S4U2Self請求使KDC崩潰。 2.受影響的軟件包 ·中標麒麟高級服務器操作系統 V7 aarch64架構: krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5 x86_64架構: krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5 3.軟件包修復版本 ·中標麒麟高級服務器操作系統 V7 krb5-devel-1.15.1-46.el7 krb5-libs-1.15.1-46.el7 krb5-pkinit-1.15.1-46.el7 krb5-server-1.15.1-46.el7 krb5-server-ldap-1.15.1-46.el7 krb5-workstation-1.15.1-46.el7 libkadm5-1.15.1-46.el7 4.修復方法 方法一：配置源進行升級安裝 1.打開軟件包源配置文件，根據倉庫地址進行修改。 倉庫源地址： 中標麒麟高級服務器操作系統 V7 aarch64:https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/ x86_64:https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/ 2.配置完成后執行更新命令進行升級，命令如下： yum update Packagename 方法二：下載安裝包進行升級安裝 通過軟件包地址下載軟件包，使用軟件包升級命令根據受影響的軟件包 列表進行升級安裝,命令如下： yum install Packagename 3.升級完成后是否需要重啟服務或操作系統： ·CVE-2018-20217：無需重啟操作系統與服務即可使漏洞修復生效。 5.軟件包下載地址 ·中標麒麟高級服務器操作系統 V7 krb5（aarch64）軟件包下載地址: https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/krb5-devel-1.15.1-46.el7.aarch64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/krb5-libs-1.15.1-46.el7.aarch64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/krb5-pkinit-1.15.1-46.el7.aarch64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/krb5-server-1.15.1-46.el7.aarch64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/krb5-server-ldap-1.15.1-46.el7.aarch64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/krb5-workstation-1.15.1-46.el7.aarch64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/aarch64/Packages/libkadm5-1.15.1-46.el7.aarch64.rpm krb5（x86_64）軟件包下載地址: https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-devel-1.15.1-46.el7.i686.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-devel-1.15.1-46.el7.x86_64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-libs-1.15.1-46.el7.i686.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-libs-1.15.1-46.el7.x86_64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-pkinit-1.15.1-46.el7.x86_64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-server-1.15.1-46.el7.i686.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-server-1.15.1-46.el7.x86_64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-server-ldap-1.15.1-46.el7.i686.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-server-ldap-1.15.1-46.el7.x86_64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/krb5-workstation-1.15.1-46.el7.x86_64.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/libkadm5-1.15.1-46.el7.i686.rpm https://update.cs2c.com.cn/NS/V7/V7Update8/os/adv/lic/base/x86_64/Packages/libkadm5-1.15.1-46.el7.x86_64.rpm 注：其他相關依賴包請到相同目錄下載 6.修復驗證 使用軟件包查詢命令，查看相關軟件包版本是否與修復版本一致，如果版本一致，則說明修復成功。 sudo rpm -qa | grep Packagename