公告ID（KYSA-202208-1234）
公告ID：KYSA-202208-1234
公告摘要：krb5安全漏洞
安全漏洞等級(jí)：Moderate
發(fā)布日期：2022/8/16
詳細(xì)介紹
1.修復(fù)的CVE
·CVE-2018-20217
描述：在1.17之前的MIT Kerberos 5（aka krb5）的KDC中發(fā)現(xiàn)了一個(gè)可訪問(wèn)的斷言問(wèn)題。如果攻擊者可以使用較舊的加密類(lèi)型（single DES、triple DES或RC4）獲取krbtgt票證，則攻擊者可以通過(guò)發(fā)出S4U2Self請(qǐng)求使KDC崩潰。
2.受影響的軟件包
·中標(biāo)麒麟高級(jí)服務(wù)器操作系統(tǒng) V7
aarch64架構(gòu):
krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5
x86_64架構(gòu):
krb5-devel、krb5-libs、krb5-pkinit、krb5-server、krb5-server-ldap、krb5-workstation、libkadm5
3.軟件包修復(fù)版本
·中標(biāo)麒麟高級(jí)服務(wù)器操作系統(tǒng) 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(fù)方法
方法一：配置源進(jìn)行升級(jí)安裝
1.打開(kāi)軟件包源配置文件，根據(jù)倉(cāng)庫(kù)地址進(jìn)行修改。
倉(cāng)庫(kù)源地址：
中標(biāo)麒麟高級(jí)服務(wù)器操作系統(tǒng) 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(zhí)行更新命令進(jìn)行升級(jí)，命令如下：
yum update Packagename
方法二：下載安裝包進(jìn)行升級(jí)安裝
通過(guò)軟件包地址下載軟件包，使用軟件包升級(jí)命令根據(jù)受影響的軟件包
列表進(jìn)行升級(jí)安裝,命令如下：
yum install Packagename
3.升級(jí)完成后是否需要重啟服務(wù)或操作系統(tǒng)：
·CVE-2018-20217：無(wú)需重啟操作系統(tǒng)與服務(wù)即可使漏洞修復(fù)生效。
5.軟件包下載地址
·中標(biāo)麒麟高級(jí)服務(wù)器操作系統(tǒng) 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(guān)依賴包請(qǐng)到相同目錄下載
6.修復(fù)驗(yàn)證
使用軟件包查詢命令，查看相關(guān)軟件包版本是否與修復(fù)版本一致，如果版本一致，則說(shuō)明修復(fù)成功。
sudo rpm -qa | grep Packagename
