Alpine before 2.25 allows remote attackers to cause a denial of service (application crash) when LIST or LSUB is sent before STARTTLS.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7360-1 advisory.

    It was discovered that Alpine did not use a secure connection under certain circumstances. A remote     attacker could possibly use this issue to leak sensitive information. (CVE-2020-14929)

    It was discovered that Alpine could allow untagged responses from an IMAP server before upgrading to a TLS     connection. A remote attacker could possibly use this issue to leak sensitive information.
    (CVE-2021-38370)

    It was discovered that Alpine could crash when receiving certain SMTP commands. A remote attacker could     possibly use this issue to cause a denial of service. (CVE-2021-46853)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Alpine before 2.25 allows remote attackers to cause a denial of service (application crash) when LIST or     LSUB is sent before STARTTLS. (CVE-2021-46853)

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

The remote host is affected by the vulnerability described in GLSA-202301-07 (Alpine: Multiple Vulnerabilities)

  - In Alpine before 2.25, untagged responses from an IMAP server are accepted before STARTTLS.
    (CVE-2021-38370)

  - Alpine before 2.25 allows remote attackers to cause a denial of service (application crash) when LIST or     LSUB is sent before STARTTLS. (CVE-2021-46853)

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

ID	Name	Product	Family	Severity
232988	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Alpine vulnerabilities (USN-7360-1)	Nessus	Ubuntu Local Security Checks	high
224416	Linux Distros Unpatched Vulnerability : CVE-2021-46853	Nessus	Misc.	medium
169835	GLSA-202301-07 : Alpine: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	medium

Detections

Analytics

CVE-2021-46853

medium

Tenable Plugins

high

medium

medium