公告ID（KYSA-202407-1016）
公告ID：KYSA-202407-1016
公告摘要：dhcp安全漏洞
等級：Important
發(fā)布日期：2024-07-17
詳細介紹
1.修復的CVE
·CVE-2023-50868
描述：DNS協(xié)議中的Closest Encloser Proof方面（在跳過RFC 9276指導時的RFC 5155中）允許遠程攻擊者通過DNSSEC響應(yīng)在隨機子域攻擊中導致拒絕服務(wù)（CPU消耗用于SHA-1計算），也被稱為NSEC3問題。RFC 5155規(guī)范意味著在某些情況下，算法必須執(zhí)行數(shù)千次哈希函數(shù)迭代
2.受影響的軟件包
·中標麒麟高級服務(wù)器操作系統(tǒng) V7
·aarch64架構(gòu):
dhcp-libs、dhcp-devel、dhclient、dhcp、dhcp-common
·x86_64架構(gòu):
dhcp-libs、dhcp-devel、dhclient、dhcp、dhcp-common
·銀河麒麟高級服務(wù)器操作系統(tǒng) V10
·aarch64架構(gòu):
dhcp-libs、dhcp-devel、dhclient、dhcp、dhcp-common
·x86_64架構(gòu):
dhcp-libs、dhcp-devel、dhclient、dhcp、dhcp-common
3.軟件包修復版本
·中標麒麟高級服務(wù)器操作系統(tǒng) V7 (aarch64、x86_64)
dhclient-4.2.5-83.el7_9.2或以上版本
dhcp-libs-4.2.5-83.el7_9.2或以上版本
dhcp-common-4.2.5-83.el7_9.2或以上版本
dhcp-4.2.5-83.el7_9.2或以上版本
dhcp-devel-4.2.5-83.el7_9.2或以上版本
·銀河麒麟高級服務(wù)器操作系統(tǒng) V10 (aarch64、x86_64)
dhclient-4.2.5-83.el7_9.2或以上版本
dhcp-libs-4.2.5-83.el7_9.2或以上版本
dhcp-4.2.5-83.el7_9.2或以上版本
dhcp-common-4.2.5-83.el7_9.2或以上版本
dhcp-devel-4.2.5-83.el7_9.2或以上版本
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(jù)倉庫地址進行修改。
倉庫源地址：
中標麒麟高級服務(wù)器操作系統(tǒng) V7
aarch64:https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/
x86_64:https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/
銀河麒麟高級服務(wù)器操作系統(tǒng) V10
aarch64:https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/
x86_64:https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/
2.配置完成后執(zhí)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(jù)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(wù)或操作系統(tǒng)：
CVE-2023-50868:需要重啟 dhcp 以使漏洞修復生效。
5.軟件包下載地址
·中標麒麟高級服務(wù)器操作系統(tǒng) V7
dhcp(aarch64)軟件包下載地址:
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/dhcp-devel-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/dhcp-libs-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/dhcp-common-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/dhclient-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/aarch64/Packages/dhcp-4.2.5-83.el7_9.2.aarch64.rpm
dhcp(x86_64)軟件包下載地址:
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhcp-devel-4.2.5-83.el7_9.2.i686.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhcp-common-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhcp-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhclient-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhcp-devel-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhcp-libs-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V7/V7Update9/os/adv/lic/updates/x86_64/Packages/dhcp-libs-4.2.5-83.el7_9.2.i686.rpm
·銀河麒麟高級服務(wù)器操作系統(tǒng) V10
dhcp(aarch64)軟件包下載地址:
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/dhclient-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/dhcp-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/dhcp-common-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/dhcp-devel-4.2.5-83.el7_9.2.aarch64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/aarch64/Packages/dhcp-libs-4.2.5-83.el7_9.2.aarch64.rpm
dhcp(x86_64)軟件包下載地址:
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhcp-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhclient-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhcp-common-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhcp-devel-4.2.5-83.el7_9.2.i686.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhcp-libs-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhcp-devel-4.2.5-83.el7_9.2.x86_64.rpm
https://update.cs2c.com.cn/NS/V10/V10-ZJ/os/adv/lic/updates/x86_64/Packages/dhcp-libs-4.2.5-83.el7_9.2.i686.rpm
注：其他相關(guān)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(guān)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
