An issue was discovered in the auth component in Dovecot 2.2 and 2.3 before 2.3.20. When two passdb configuration entries exist with the same driver and args settings, incorrect username_filter and mechanism settings can be applied to passdb definitions. These incorrectly applied settings can lead to an unintended security configuration and can permit privilege escalation in certain configurations. The documentation does not advise against the use of passdb definitions that have the same driver and args settings. One such configuration would be where an administrator wishes to use the same PAM configuration or passwd file for both normal and master users but use the username_filter setting to restrict which of the users is able to be a master user.
Max CVSS
8.8
EPSS Score
0.36%
Published
2022-07-17
Updated
2024-01-12
The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.
Max CVSS
5.8
EPSS Score
0.36%
Published
2021-06-28
Updated
2022-09-28
Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.
Max CVSS
7.5
EPSS Score
0.05%
Published
2021-06-28
Updated
2021-09-20
The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular expression for the regex extension.
Max CVSS
4.3
EPSS Score
0.23%
Published
2021-06-28
Updated
2022-05-03
Dovecot before 2.3.13 has Improper Input Validation in lda, lmtp, and imap, leading to an application crash via a crafted email message with certain choices for ten thousand MIME parts.
Max CVSS
7.5
EPSS Score
1.10%
Published
2021-01-04
Updated
2022-09-02
An issue was discovered in Dovecot before 2.3.13. 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).
Max CVSS
6.8
EPSS Score
0.38%
Published
2021-01-04
Updated
2022-09-02
In Dovecot before 2.3.11.3, sending a specially formatted RPA request will crash the auth service because a length of zero is mishandled.
Max CVSS
7.5
EPSS Score
0.31%
Published
2020-08-12
Updated
2023-02-03
In Dovecot before 2.3.11.3, sending a specially formatted NTLM request will crash the auth service because of an out-of-bounds read.
Max CVSS
7.5
EPSS Score
0.69%
Published
2020-08-12
Updated
2023-02-03
In Dovecot before 2.3.11.3, uncontrolled recursion in submission, lmtp, and lda allows remote attackers to cause a denial of service (resource consumption) via a crafted e-mail message with deeply nested MIME parts.
Max CVSS
7.5
EPSS Score
3.75%
Published
2020-08-12
Updated
2022-10-29
In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.
Max CVSS
5.3
EPSS Score
2.46%
Published
2020-05-18
Updated
2020-10-13
In Dovecot before 2.3.10.1, a crafted SMTP/LMTP message triggers an unauthenticated use-after-free bug in submission-login, submission, or lmtp, and can lead to a crash under circumstances involving many newlines after a command.
Max CVSS
5.3
EPSS Score
0.57%
Published
2020-05-18
Updated
2020-05-28
In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP command causes a NULL Pointer Dereference and crash in submission-login, submission, or lmtp.
Max CVSS
7.5
EPSS Score
0.67%
Published
2020-05-18
Updated
2020-05-28
The IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing > character exists. This causes a denial of service in which the recipient cannot read all of their messages.
Max CVSS
5.3
EPSS Score
0.16%
Published
2020-02-12
Updated
2022-01-01
lib-smtp in submission-login and lmtp in Dovecot 2.3.9 before 2.3.9.3 mishandles truncated UTF-8 data in command parameters, as demonstrated by the unauthenticated triggering of a submission-login infinite loop.
Max CVSS
7.8
EPSS Score
0.51%
Published
2020-02-12
Updated
2021-12-30
In Dovecot before 2.3.9.2, an attacker can crash a push-notification driver with a crafted email when push notifications are used, because of a NULL Pointer Dereference. The email must use a group address as either the sender or the recipient.
Max CVSS
5.3
EPSS Score
0.56%
Published
2019-12-13
Updated
2023-02-02
In Dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2 (and Pigeonhole before 0.5.7.2), protocol processing can fail for quoted strings. This occurs because '\0' characters are mishandled, and can lead to out-of-bounds writes and remote code execution.
Max CVSS
9.8
EPSS Score
61.39%
Published
2019-08-29
Updated
2019-09-06
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login component crashes if AUTH PLAIN is attempted over a TLS secured channel with an unacceptable authentication message.
Max CVSS
7.5
EPSS Score
0.57%
Published
2019-05-08
Updated
2023-03-01
In the IMAP Server in Dovecot 2.3.3 through 2.3.5.2, the submission-login service crashes when the client disconnects prematurely during the AUTH command.
Max CVSS
7.5
EPSS Score
2.13%
Published
2019-05-08
Updated
2023-03-01
The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
Max CVSS
7.5
EPSS Score
0.27%
Published
2019-04-24
Updated
2020-08-24
In Dovecot before 2.2.36.3 and 2.3.x before 2.3.5.1, a local attacker can cause a buffer overflow in the indexer-worker process, which can be used to elevate to root. This occurs because of missing checks in the fts and pop3-uidl components.
Max CVSS
8.8
EPSS Score
0.04%
Published
2019-03-28
Updated
2019-06-14
It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.
Max CVSS
7.7
EPSS Score
0.24%
Published
2019-03-27
Updated
2019-06-14
A flaw was found in dovecot 2.0 up to 2.2.33 and 2.3.0. An abort of SASL authentication results in a memory leak in dovecot's auth client used by login processes. The leak has impact in high performance configuration where same login processes are reused and can cause the process to crash due to memory exhaustion.
Max CVSS
7.5
EPSS Score
0.88%
Published
2018-01-25
Updated
2019-10-09
A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the process to restart.
Max CVSS
5.9
EPSS Score
0.67%
Published
2018-03-02
Updated
2019-10-03
A specially crafted email delivered over SMTP and passed on to Dovecot by MTA can trigger an out of bounds read resulting in potential sensitive information disclosure and denial of service. In order to trigger this vulnerability, an attacker needs to send a specially crafted email message to the server.
Max CVSS
7.1
EPSS Score
31.75%
Published
2018-03-02
Updated
2022-04-19
Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.
Max CVSS
7.5
EPSS Score
1.33%
Published
2018-06-21
Updated
2019-10-09
53 vulnerabilities found
1 2 3
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