mailcow is vulnerable to shell command injection via xoauth2 authentication in imapsync​

mailcow is a dockerized email package, with multiple containers linked in one bridged network. The Sync Job feature - which can be made available to standard users by assigning them the necessary permission - suffers from a shell command injection. A malicious user can abuse this vulnerability to obtain shell access to the Docker container running dovecot. The imapsync Perl script implements all the necessary functionality for this feature, including the XOAUTH2 authentication mechanism. This code path creates a shell command to call openssl. However, since different parts of the specified user password are included without any validation, one can simply execute additional shell commands. Notably, the default ACL for a newly-created mailcow account does not include the necessary permission. The Issue has been fixed within the 2023-03 Update (March 3rd 2023). As a temporary workaround the Syncjob ACL can be removed from all mailbox users, preventing from creating or changing existing Syncjobs.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

OS命令中使用的特殊元素转义处理不恰当(OS命令注入)

mailcow 操作系统命令注入漏洞

mailcow是一个邮件服务器套件。 mailcow存在操作系统命令注入漏洞。攻击者利用该漏洞获取对运行dovecot的Docker容器的shell访问权限。

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