1.修复的CVE
CVE-2020-24386
Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。Dovecot before 2.3.13 存在安全漏洞，攻击者可利用该漏洞控制的参数触发解除休眠，从而访问其他用户的电子邮件消息。
CVE-2020-25275
Dovecot是一款开源的基于类Linux/UNIX系统的IMAP和POP3邮件服务器。Dovecot before 2.3.13 存在安全漏洞，该漏洞源于不正确的输入验证，攻击者可利用该漏洞通过一个精心制作的电子邮件消息导致应用程序崩溃。
银河麒麟桌面操作系统V4 SP1
银河麒麟桌面操作系统V4 SP2
银河麒麟桌面操作系统V4 SP3
银河麒麟桌面操作系统V4 SP4
银河麒麟服务器操作系统V4 SP1
银河麒麟服务器操作系统V4 SP2
银河麒麟服务器操作系统V4 SP3
银河麒麟服务器操作系统V4 SP4
银河麒麟桌面操作系统V10
银河麒麟桌面操作系统V10 SP1
软件包：dovecot
1:2.2.22-1kord2.14（V4、V10）
1:2.3.7.2-1kylin3.3(V10 SP1)
·银河麒麟操作系统V10桌面版、V4
dovecot-auth-lua
dovecot-core
dovecot-dev
dovecot-gssapi
dovecot-imapd
dovecot-ldap
dovecot-lmtpd
dovecot-lucene
dovecot-managesieved
dovecot-mysql
dovecot-pgsql
dovecot-pop3d
dovecot-sieve
dovecot-solr
dovecot-sqlite
dovecot-submissiond
mail-stack-delivery
·银河麒麟桌面操作系统V10 SP1
dovecot-auth-lua
dovecot-core
dovecot-dev
dovecot-gssapi
dovecot-imapd
dovecot-ldap
dovecot-lmtpd
dovecot-lucene
dovecot-managesieved
dovecot-mysql
dovecot-pgsql
dovecot-pop3d
dovecot-sieve
dovecot-solr
dovecot-sqlite
dovecot-submissiond
mail-stack-delivery
打开软件包源配置文件，根据仓库地址进行修改。
4.0.2桌面版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2-desktop main restricted universe multiverse
4.0.2-sp1桌面版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp1-desktop main restricted universe multiverse
4.0.2-sp2桌面版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp2-desktop main restricted universe multiverse
4.0.2-sp3桌面版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp3-desktop main restricted universe multiverse
4.0.2-sp4桌面版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 4.0.2sp4-desktop main restricted universe multiverse
10.0版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 10.0 main restricted universe multiverse
10SP1版本:
http://archive.kylinos.cn/kylin/KYLIN-ALL 10.1 main restricted universe multiverse
配置完成后执行更新命令进行升级
$sudo apt update
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组件包列表 升级相关的组件包。
$dpkg -i Packagelists
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