When cache is enabled, some passdb/userdb drivers incorrectly cache all users with same cache key, causing wrong cached information to be used for these users. After cached login, all subsequent logins are for same user. Install fixed version or disable caching either globally or for the impacted passdb/userdb drivers. No publicly available exploits are known.

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2025-20113-1 advisory.

    - Update dovecot to 2.4.2:
      - CVE-2025-30189: Fixed users cached with same cache key when         auth cache was enabled (bsc#1252839)
      - Changes
        - auth: Remove proxy_always field.
        - config: Change settings history parsing to use python3.
        - doveadm: Print table formatter - Print empty values as -.
        - imapc: Propagate remote error codes properly.
        - lda: Default mail_home=$HOME environment if not using userdb           lookup
        - lib-dcrypt: Salt for new version 2 keys has been increased to           16 bytes.
        - lib-dregex: Add libpcre2 based regular expression support to           Dovecot, if the library is missing, disable all regular           expressions. This adds libpcre2-32 as build dependency.
        - lib-oauth2: jwt - Allow nbf and iat to point 1 second into           future.
        - lib: Replace libicu with our own unicode library. Removes           libicu as build dependency.
        - login-common: If proxying fails due to remote having invalid           SSL cert, don't reconnect.
      - New features
        - auth: Add ssl_client_cert_fp and ssl_client_cert_pubkey_fp           fields
        - config: Add support for $SET:filter/path/setting.
        - config: Improve @group includes to work with overwriting           their settings.
        - doveadm kick: Add support for kicking multiple usernames
        - doveadm mailbox status: Add support for deleted status item.
        - imap, imap-client: Add experimental partial IMAP4rev2           support.
        - imap: Implement support for UTF8=ACCEPT for APPEND
        - lib-oauth2, oauth2: Add oauth2_token_expire_grace setting.
        - lmtp: lmtp-client - Support command pipelining.
        - login-common: Support local/remote blocks better.
        - master: accept() unix/inet connections before creating child           process to handle it. This reduces timeouts when child           processes are slow to spawn themselves.
      - Bug fixes
        - SMTPUTF8 was accepted even when it wasn't enabled.
        - auth, *-login: Direct logging with -L parameter was not           working.
        - auth: Crash occured when OAUTH token validation failed with           oauth2_use_worker_with_mech=yes.
        - auth: Invalid field handling crashes were fixed.
        - auth: ldap - Potential crash could happen at deinit.
        - auth: mech-gssapi - Server sending empty initial response           would cause errors.
        - auth: mech-winbind - GSS-SPNEGO mechanism was erroneously           marked as
        - not accepting NUL.
        - config: Multiple issues with $SET handling has been fixed.
        - configure: Building without LDAP didn't work.
        - doveadm: If source user didn't exist, a crash would occur.
        - imap, pop3, submission, imap-urlauth: USER environment usage           was broken when running standalone.
        - imap-hibernate: Statistics would get truncated on           unhibernation.
        - imap: SEARCH MIMEPART FILENAME ENDS command could have           accessed memory outside allocated buffer, resulting in a           crash.
        - imapc: Fetching partial headers would cause other cached           headers to be cached empty, breaking e.g. imap envelope           responses when caching to disk.
        - imapc: Shared namespace's INBOX mailbox was not always           uppercased.
        - imapc: imapc_features=guid-forced GUID generation was not           working correctly.
        - lda: USER environment was not accepted if -d hasn't been           specified.
        - lib-http: http-url - Significant path percent encoding           through parse and create was not preserved. This is mainly           important for Dovecot's Lua bindings for lib-http.
        - lib-settings: Crash would occur when using %variables in           SET_FILE type settings.
        - lib-storage: Attachment flags were attempted to be added for           readonly mailboxes with mail_attachment_flags=add-flags.
        - lib-storage: Root directory for unusable shared namespaces           was unnecessarily attempted to be created.
        - lib: Crash would occur when config was reloaded and logging           to syslog.
        - login-common: Crash might have occured when login proxy was           destroyed.
        - sqlite: The sqlite_journal_mode=wal setting didn't actually           do anything.
        - Many other bugs have been fixed.
    - Update pigeonhole to 2.4.2
      - Changes
        - lib-sieve: Use new regular expression library in core.
        - managesieve: Add default           service_extra_groups=$SET:default_internal_group.
      - New features
        - lib-sieve: Add support for extlists extension.
        - lib-sieve: regex - Allow unicode comparator.
      - Bug fixes
        - lib-sieve-tool: sieve-tool - All sieve_script settings were           overriden.
        - lib-sieve: storage: dict: sieve_script_dict filter was           missing from settings.
        - sieve-ldap-storage: Fix compile without LDAP.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-e491c93405 advisory.

    fixes CVE-2025-30189


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-97d8911108 advisory.

    fix CVE-2025-30189

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2025-d5eb72768a advisory.

    Automatic update for dovecot-2.4.1-6.fc44.

    ##### **Changelog**

    ```
    * Thu Oct  9 2025 Michal Hlavinka <mhlavink@redhat.com> - 1:2.4.1-6
    - fix CVE-2025-30189: users would end up overwriting each other in cache (rhbz#2402122)

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
277015	openSUSE 16 Security Update : dovecot24 (openSUSE-SU-2025-20113-1)	Nessus	SuSE Local Security Checks	high
276504	Fedora 43 : dovecot (2025-e491c93405)	Nessus	Fedora Local Security Checks	high
271467	Fedora 43 : dovecot (2025-97d8911108)	Nessus	Fedora Local Security Checks	critical
269908	Fedora 44 : dovecot (2025-d5eb72768a)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2025-30189

high

Tenable Plugins

high

high

critical

high