1. 修復的CVE信息
CVE-2021-25219
ISC BIND是美國ISC公司的一套實現了DNS協議的開源軟件。BIND 中存在資源管理錯誤漏洞，該漏洞源于產品的授權服務器的相應處理存在錯誤。攻擊者可通過該漏洞導致BIND解析器性能下降進而導致查詢處理延遲。
2. 影響的操作系統
銀河麒麟桌面操作系統V4 SP1
銀河麒麟桌面操作系統V4 SP2
銀河麒麟桌面操作系統V4 SP3
銀河麒麟桌面操作系統V4 SP4
銀河麒麟桌面操作系統V10
銀河麒麟服務器操作系統V4 SP1
銀河麒麟服務器操作系統V4 SP2
銀河麒麟服務器操作系統V4 SP3
銀河麒麟服務器操作系統V4 SP4
銀河麒麟桌面操作系統V10 SP1
3. 修復版本
軟件包：strongswan
9.10.3.dfsg.P4-8kord1.19+esm1（V4、V10）
9.16.1-0kylin2.9（V10 SP1）
4. 受影響的軟件包
銀河麒麟桌面操作系統V10、V4
bind9
bind9-dnsutils
bind9-doc
bind9-host
bind9-libs
bind9-utils
bind9utils
dnsutils
銀河麒麟桌面操作系統V10 SP1
bind9
bind9-dnsutils
bind9-doc
bind9-host
bind9-libs
bind9-utils
bind9utils
dnsutils
5. 修復方法
方法一：配置源進行升級安裝
打開軟件包源配置文件，根據倉庫地址進行修改。
4.0.2-sp1:http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp1-desktop main restricted universe multiverse
4.0.2-sp2:http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp2-desktop main restricted universe multiverse
4.0.2-sp3:http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp3-desktop main restricted universe multiverse
4.0.2-sp4:http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp4-desktop main restricted universe multiverse
10.0:http://archive.kylinos.cn/kylin/KYLIN-ALL 10.0 main restricted universe multiverse
10.0 SP1:http://archive.kylinos.cn/kylin/KYLIN-ALL 10.1 main restricted universe multiverse
配置完成后執行更新命令進行升級。$sudo apt update
方法二：下載安裝包進行升級安裝
通過軟件包地址下載軟件包，使用軟件包升級命令根據受影響的組件包列表 升級相關的組件包。$dpkg -i Packagelists
6. 軟件包下載地址
銀河麒麟桌面操作系統V10、V4
X86_64軟件包下載地址：
arm64軟件包下載地址：
銀河麒麟桌面操作系統V10 SP1
X86_64軟件包下載地址：
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/dnsutils_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9_9.16.1-0kylin2.9_amd64.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9utils_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-doc_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-host_9.16.1-0kylin2.9_amd64.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-libs_9.16.1-0kylin2.9_amd64.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-utils_9.16.1-0kylin2.9_amd64.deb
arm64軟件包下載地址：
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/dnsutils_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9_9.16.1-0kylin2.9_arm64.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9utils_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-doc_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-host_9.16.1-0kylin2.9_arm64.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-libs_9.16.1-0kylin2.9_arm64.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-utils_9.16.1-0kylin2.9_arm64.deb
mips64el軟件包下載地址：
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/dnsutils_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9_9.16.1-0kylin2.9_mips64el.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9utils_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-doc_9.16.1-0kylin2.9_all.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-host_9.16.1-0kylin2.9_mips64el.deb
http://archive.kylinos.cn/kylin/KYLIN-ALL/pool/main/b/bind9/bind9-libs_9.16.1-0kylin2.9_mips64el.deb
