The remote AlmaLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2022:1964 advisory.

  - report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf     va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified     other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic     platform results in an impact beyond an inconvenience to the client user. (CVE-2021-36386)

  - Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a     certain situation with IMAP and PREAUTH. (CVE-2021-39272)

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

The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2022-1964 advisory.

    [6.4.24-1]
    - Update to fetchmail-6.4.24 (fixes CVE-2021-36386 and CVE-2021-39272)       Resolves: #1999275, #2002698

Tenable has extracted the preceding description block directly from the Oracle Linux 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 Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2022:1964 advisory.

    Fetchmail is a remote mail retrieval and forwarding utility intended for use over on-demand TCP/IP links,     like SLIP or PPP connections. Fetchmail supports every remote-mail protocol currently in use on the     Internet (POP2, POP3, RPOP, APOP, KPOP, all IMAPs, ESMTP ETRN, IPv6, and IPSEC) for retrieval. Then     Fetchmail forwards the mail through SMTP so the user can read it through their favorite mail client.

    Security Fix(es):

    * fetchmail: DoS or information disclosure when logging long messages (CVE-2021-36386)

    * fetchmail: STARTTLS session encryption bypassing (CVE-2021-39272)

    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 Red Hat Enterprise Linux 8.6 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 CentOS Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the fetchmail-6.4.24-1.el9 build changelog.

  - report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf     va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified     other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic     platform results in an impact beyond an inconvenience to the client user. (CVE-2021-36386)

  - Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a     certain situation with IMAP and PREAUTH. (CVE-2021-39272)

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

The remote MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2022-3362:02 advisory.

    * fetchmail: DoS or information disclosure when logging long messages     (CVE-2021-36386)
      * fetchmail: STARTTLS session encryption bypassing (CVE-2021-39272)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2022:1964 advisory.

  - fetchmail: DoS or information disclosure when logging long messages (CVE-2021-36386)

  - fetchmail: STARTTLS session encryption bypassing (CVE-2021-39272)

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0198 advisory.

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

    CVE-2021-36386:
    report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf     va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified     other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic     platform results in an impact beyond an inconvenience to the client user.

    CVE-2021-39272:
    Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a     certain situation with IMAP and PREAUTH.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux 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 SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:4018-1 advisory.

  - report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf     va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified     other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic     platform results in an impact beyond an inconvenience to the client user. (CVE-2021-36386)

  - Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a     certain situation with IMAP and PREAUTH. (CVE-2021-39272)

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 fetchmail package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf     va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified     other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic     platform results in an impact beyond an inconvenience to the client user. (CVE-2021-36386)

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.

Matthias Andree reports :

When a log message exceeds c. 2 kByte in size, for instance, with very long header contents, and depending on verbosity option, fetchmail can crash or misreport each first log message that requires a buffer reallocation.

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

  - report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf     va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified     other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic     platform results in an impact beyond an inconvenience to the client user. (CVE-2021-36386)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
161123	AlmaLinux 8 : fetchmail (ALSA-2022:1964)	Nessus	Alma Linux Local Security Checks	2022/5/12	2022/5/12	medium
161312	Oracle Linux 8 : fetchmail (ELSA-2022-1964)	Nessus	Oracle Linux Local Security Checks	2022/5/18	2024/10/22	medium
161006	RHEL 8 : fetchmail (RHSA-2022:1964)	Nessus	Red Hat Local Security Checks	2022/5/11	2024/11/7	medium
191318	CentOS 9 : fetchmail-6.4.24-1.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	medium
294497	MiracleLinux 8 : fetchmail-6.4.24-1.el8.ML.1 (AXSA:2022-3362:02)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/20	medium
160955	CentOS 8 : fetchmail (CESA-2022:1964)	Nessus	CentOS Local Security Checks	2022/5/10	2022/5/10	medium
235980	Alibaba Cloud Linux 3 : 0198: fetchmail (ALINUX3-SA-2022:0198)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	medium
156154	openSUSE 15 Security Update : fetchmail (openSUSE-SU-2021:4018-1)	Nessus	SuSE Local Security Checks	2021/12/17	2021/12/17	medium
158274	EulerOS 2.0 SP3 : fetchmail (EulerOS-SA-2022-1162)	Nessus	Huawei Local Security Checks	2022/2/23	2022/2/23	high
152150	FreeBSD : fetchmail -- 6.4.19 and older denial of service or information disclosure (cbfd1874-efea-11eb-8fe9-036bd763ff35)	Nessus	FreeBSD Local Security Checks	2021/7/30	2021/8/11	high
259252	Linux Distros Unpatched Vulnerability : CVE-2021-36386	Nessus	Misc.	2025/8/30	2026/6/27	high

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