1. 修复的CVE

·CVE-2021-37750

描述：在krb5中发现了一个缺陷。MIT Kerberos 5中的密钥分发中心（KDC）通过一个缺少服务器字段的快速内部主体进行空指针解引用。经过身份验证的攻击者可利用此漏洞使Kerberos KDC服务器崩溃。此漏洞的最大威胁是系统可用性。

2. 受影响的软件包

·银河麒麟高级服务器操作系统 V10

aarch64架构:

krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5

x86_64架构:

krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5

·中标麒麟高级服务器操作系统 V7

aarch64架构:

krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5

x86_64架构:

krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5

3. 软件包修复版本

·银河麒麟高级服务器操作系统 V10

krb5-devel-1.15.1-51.el7_9.ns7.01

krb5-libs-1.15.1-51.el7_9.ns7.01

krb5-pkinit-1.15.1-51.el7_9.ns7.01

krb5-server-1.15.1-51.el7_9.ns7.01

krb5-server-ldap-1.15.1-51.el7_9.ns7.01

krb5-workstation-1.15.1-51.el7_9.ns7.01

libkadm5-1.15.1-51.el7_9.ns7.01

·中标麒麟高级服务器操作系统 V7

krb5-devel-1.15.1-51.el7_9.ns7.01

krb5-libs-1.15.1-51.el7_9.ns7.01

krb5-pkinit-1.15.1-51.el7_9.ns7.01

krb5-server-1.15.1-51.el7_9.ns7.01

krb5-server-ldap-1.15.1-51.el7_9.ns7.01

krb5-workstation-1.15.1-51.el7_9.ns7.01

libkadm5-1.15.1-51.el7_9.ns7.01

4. 修复方法

方法一：配置源进行升级安装

1. 打开软件包源配置文件，根据仓库地址进行修改。

仓库源地址：

银河麒麟高级服务器操作系统 V10

aarch64:http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/

x86_64:http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/

中标麒麟高级服务器操作系统 V7

aarch64:http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/

x86_64:http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/

2. 配置完成后执行更新命令进行升级，命令如下：

yum update Packagename

方法二：下载安装包进行升级安装

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进行升级安装,命令如下：

yum install Packagename

3. 升级完成后是否需要重启服务或操作系统：

·CVE-2021-37750：需要重启 %s 以使漏洞修复生效。

5. 软件包下载地址

·银河麒麟高级服务器操作系统 V10

krb5（aarch64）软件包下载地址:

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/krb5-devel-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/krb5-libs-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/krb5-pkinit-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/krb5-server-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/krb5-server-ldap-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/krb5-workstation-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/libkadm5-1.15.1-51.el7_9.ns7.01.aarch64.rpm

krb5（x86_64）软件包下载地址:

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-devel-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-devel-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-libs-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-libs-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-pkinit-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-server-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-server-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-server-ldap-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-server-ldap-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/krb5-workstation-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/libkadm5-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/libkadm5-1.15.1-51.el7_9.ns7.01.x86_64.rpm

·中标麒麟高级服务器操作系统 V7

krb5（aarch64）软件包下载地址:

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/krb5-devel-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/krb5-libs-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/krb5-pkinit-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/krb5-server-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/krb5-server-ldap-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/krb5-workstation-1.15.1-51.el7_9.ns7.01.aarch64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/libkadm5-1.15.1-51.el7_9.ns7.01.aarch64.rpm

krb5（x86_64）软件包下载地址:

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-devel-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-devel-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-libs-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-libs-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-pkinit-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-server-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-server-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-server-ldap-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-server-ldap-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/krb5-workstation-1.15.1-51.el7_9.ns7.01.x86_64.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/libkadm5-1.15.1-51.el7_9.ns7.01.i686.rpm

http://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/libkadm5-1.15.1-51.el7_9.ns7.01.x86_64.rpm

注：其他相关依赖包请到相同目录下载

6. 修复验证

使用软件包查询命令，查看相关软件包版本是否与修复版本一致，如果版本一致，则说明修复成功。

sudo rpm -qa | grep Packagename