CVE-2021-33515

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.

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.

Dovecot is an IMAP server for Linux/UNIX-like systemsa wrapper package that will just handle common things for all versioned dovecot packages.

Security Fix(es):

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.(CVE-2020-28200)

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.(CVE-2021-33515)

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages.

The following packages have been upgraded to a later upstream version: dovecot (2.3.16). (BZ#1980014)

Security Fix(es):

• dovecot: plaintext commands injection (CVE-2021-33515)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

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.

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages.

The following packages have been upgraded to a later upstream version: dovecot (2.3.16). (BZ#1980014)

Security Fix(es):

• dovecot: plaintext commands injection (CVE-2021-33515)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• CVE-2021-33515: fix possible command injection by stopping reading commands when input was locked by the STARTTLS command

• CVE-2021-33515: fix possible command injection by stopping reading commands when input was locked by the STARTTLS command

Updated dovecot packages fix security vulnerabilities:

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 (CVE-2020-28200).

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 (CVE-2021-29157).

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 (CVE-2021-33515).

This update for dovecot23 fixes the following issues:

• CVE-2021-29157: Local attacker can login as any user and access their emails (bsc#1187418)
• CVE-2021-33515: Attacker can potentially steal user credentials and mails (bsc#1187419)

This update for dovecot23 fixes the following issues:

• CVE-2021-29157: Local attacker can login as any user and access their emails (bsc#1187418)
• CVE-2021-33515: Attacker can potentially steal user credentials and mails (bsc#1187419)

These are all security issues fixed in the dovecot23-2.3.16-1.6 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the dovecot24-2.4.0-1.1 package on the GA media of openSUSE Tumbleweed.

This update for dovecot23 fixes the following issues:

• CVE-2021-29157: Local attacker can login as any user and access their emails (bsc#1187418)
• CVE-2021-33515: Attacker can potentially steal user credentials and mails (bsc#1187419)

This update for dovecot23 fixes the following issues:

• CVE-2021-29157: Local attacker can login as any user and access their emails (bsc#1187418)
• CVE-2021-33515: Attacker can potentially steal user credentials and mails (bsc#1187419)

This update for dovecot23 fixes the following issues:

• CVE-2021-29157: Local attacker can login as any user and access their emails (bsc#1187418)
• CVE-2021-33515: Attacker can potentially steal user credentials and mails (bsc#1187419)

Kirin discovered that Dovecot incorrectly escaped kid and azp fields in JWT tokens. A local attacker could possibly use this issue to validate tokens using arbitrary keys. This issue only affected Ubuntu 20.10 and Ubuntu 21.04. (CVE-2021-29157)

Fabian Ising and Damian Poddebniak discovered that Dovecot incorrectly handled STARTTLS when using the SMTP submission service. A remote attacker could possibly use this issue to inject plaintext commands before STARTTLS negotiation. (CVE-2021-33515)