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checkpassword-reply in Dovecot before 2.2.7 performs setuid operations to a user who is authenticating, which allows local users to bypass authentication and access virtual email accounts by attaching to the process and using a restricted file descriptor to modify account information in the response to the dovecot-auth server.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade dovecot | Jul 30, 2024 | Dec 9, 2013 |
| Ubuntu | — | Upgrade dovecot-core | Feb 2, 2018 | Dec 9, 2013 |
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