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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-03-03T23:37:03.105Z

Updated: 2024-08-02T11:53:54.242Z

Reserved: 2023-02-23T23:22:58.575Z

Link: CVE-2023-26490

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2023-03-04T00:15:15.647

Modified: 2023-03-09T20:33:31.567

Link: CVE-2023-26490

cve-icon Redhat

No data.