Aki Tuomi

**Name of the Vulnerable Software and Affected Versions** Dovecot versions prior to 2.3.13 **Description** The issue is related to the improper neutralization of control and meta characters in the Dovecot mail server, allowing a remote attacker to access and compromise confidential data. By using IMAP IDLE, an authenticated attacker can trigger unhibernation via attacker-controlled parameters, leading to access to other users' email messages and path disclosure. **Recommendations** For versions prior to 2.3.13, update to version 2.3.13 or later to resolve the issue. As a temporary workaround, consider restricting access to IMAP IDLE functionality until a patch is applied. Avoid using attacker-controlled parameters in IMAP IDLE to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** Dovecot versions prior to 2.3.11.3 **Description** The issue is related to incorrect input validation in the Dovecot mail server, which can be exploited by a remote attacker. This exploitation can lead to a disruption in the authentication service due to an out-of-bounds read caused by sending a specially formatted NTLM request. **Recommendations** For versions prior to 2.3.11.3, update to version 2.3.11.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the NTLM authentication mechanism until the update is applied.

**Name of the Vulnerable Software and Affected Versions** Dovecot versions prior to 2.2.27 **Description** The issue allows remote attackers to cause a denial of service by aborting authentication without setting a username when the auth-policy is configured in the auth component. **Recommendations** For versions prior to 2.2.27, update to version 2.2.27 or later to resolve the issue.