The remote host is affected by the vulnerability described in GLSA-202107-41 (Dovecot: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Dovecot. Please review       the CVE identifiers referenced below for details.
  Impact :

    Please review the referenced CVE identifiers for details.
  Workaround :

    There is no known workaround at this time.

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2022:1950 advisory.

  - 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)

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2022:0239 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

      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.

Tenable has extracted the preceding description block directly from the Tencent Linux 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 MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2022-3412:01 advisory.

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

Tenable has extracted the preceding description block directly from the MiracleLinux 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 Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3122 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3122-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                         Anton Gladky     September 27, 2022                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : dovecot     Version        : 1:2.3.4.1-5+deb10u7     CVE ID         : CVE-2021-33515 CVE-2022-30550

    Two security issues were discovered in dovecot: IMAP and POP3 email server.

    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.

    CVE-2022-30550

        When two passdb configuration entries exist with the same driver and args         settings, incorrectly applied settings can lead to an unintended security         configuration and can permit privilege escalation in certain configurations.

    For Debian 10 buster, these problems have been fixed in version     1:2.3.4.1-5+deb10u7.

    We recommend that you upgrade your dovecot packages.

    For the detailed security status of dovecot please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/dovecot

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

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

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

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2123-1 advisory.

    - 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)

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

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

Dovecot team reports :

CVE-2021-29157: Dovecot does not correctly escape kid and azp fields in JWT tokens. This may be used to supply attacker controlled keys to validate tokens in some configurations. This requires attacker to be able to write files to local disk.

CVE-2021-33515: On-path attacker could inject plaintext commands before STARTTLS negotiation that would be executed after STARTTLS finished with the client. Only the SMTP submission service is affected.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2022:1950 advisory.

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

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

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-1950 advisory.

    [1:2.3.16-2]
    - do not disable xz/lzma for now despite being deprecated

    [1:2.3.16-1]
    - dovecot updated to 2.3.16, pigeonhole to 0.5.16
    - fix CVE-2021-33515 plaintext commands injection (#1980014)

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

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

According to the versions of the dovecot packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - 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)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2022:0197 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    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.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux 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	名称	产品	系列	发布时间	最近更新时间	严重程度
157022	GLSA-202107-41 : Dovecot: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	2022/1/24	2024/1/16	medium
161092	AlmaLinux 8 : dovecot (ALSA-2022:1950)	Nessus	Alma Linux Local Security Checks	2022/5/12	2022/5/12	medium
223843	Linux Distros Unpatched Vulnerability : CVE-2021-33515	Nessus	Misc.	2025/3/5	2026/8/2	medium
276380	TencentOS Server 3: dovecot (TSSA-2022:0239)	Nessus	Tencent Local Security Checks	2025/11/20	2025/11/20	medium
293797	MiracleLinux 8 : dovecot-2.3.16-2.el8 (AXSA:2022-3412:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium
165510	Debian dla-3122 : dovecot-auth-lua - security update	Nessus	Debian Local Security Checks	2022/9/27	2025/1/22	high
151094	SUSE SLES15: dovecot23 / dovecot23-backend-mysql / dovecot23-backend-pgsql / etc (SUSE-SU-2021:2123-1)	Nessus	SuSE Local Security Checks	2021/6/28	2026/6/25	medium
151003	FreeBSD : dovecot -- multiple vulnerabilities (d18f431d-d360-11eb-a32c-00a0989e4ec1)	Nessus	FreeBSD Local Security Checks	2021/6/25	2022/5/9	medium
160961	CentOS 8 : dovecot (CESA-2022:1950)	Nessus	CentOS Local Security Checks	2022/5/10	2022/5/10	medium
161315	Oracle Linux 8 : dovecot (ELSA-2022-1950)	Nessus	Oracle Linux Local Security Checks	2022/5/18	2024/11/1	medium
153629	EulerOS 2.0 SP8 : dovecot (EulerOS-SA-2021-2459)	Nessus	Huawei Local Security Checks	2021/9/24	2021/9/24	medium
236014	Alibaba Cloud Linux 3 : 0197: dovecot (ALINUX3-SA-2022:0197)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	medium

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