CVE-2023-26490

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Summary

CVECVE-2023-26490
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-03-04 00:15:00 UTC
Updated2023-03-09 20:33:00 UTC
Descriptionmailcow 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.

Risk And Classification

Problem Types: CWE-78

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mailcow Mailcow _dockerized All All All

References

ReferenceSourceLinkTags
Release ???????? Moorch 2023 Update - ⚠️ CVE-2023-26490 ⚠️ and some fixes · mailcow/mailcow-dockerized · GitHub MISC github.com
Shell command injection via xoauth2 authentication in imapsync​ · Advisory · mailcow/mailcow-dockerized · GitHub MISC github.com
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