Alpine before 2.23 silently proceeds to use an insecure connection after a /tls is sent in certain circumstances involving PREAUTH, which is a less secure behavior than the alternative of closing the connection and letting the user decide what they would like to do.

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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Alpine before 2.23 silently proceeds to use an insecure connection after a /tls is sent in certain
    circumstances involving PREAUTH, which is a less secure behavior than the alternative of closing the
    connection and letting the user decide what they would like to do. (CVE-2020-14929)

This update for alpine fixes the following issues :

Update to release 2.24

  - A few crash fixes

  - Implementation of XOAUTH2 for Yahoo! Mail.

Update to release 2.23.2

  - Expansion of the configuration screen for XOAUTH2 to     include username, and tenant.

  - Alpine uses the domain in the From: header of a message     to generate a message-id and suppresses all information     about Alpine, version, revision, and time of generation     of the message-id from this header.

  - Alpine does not generate Sender or X-X-Sender by default     by enabling [X] Disable Sender as the default.

  - Alpine does not disclose User Agent by default by     enabling [X] Suppress User Agent by default.

  - When messages are selected, pressing the ';' command to     broaden or narrow a search, now offers the possibility     to completely replace the search, and is almost     equivalent to being a shortcut to 'unselect all     messages, and select again'.

Update to release 2.23

  - Fixes boo#1173281, CVE-2020-14929: Alpine silently     proceeds to use an insecure connection after a /tls is     sent in certain circumstances.

  - Implementation of XOAUTH2 authentication support for     Outlook.

  - Add support for the OAUTHBEARER authentication method in     Gmail.

  - Support for the SASL-IR IMAP extension.

  - Alpine can pass an HTML message to an external web     browser, by using the 'External' command in the     ATTACHMENT INDEX screen.

Update to release 2.22

  - Support for XOAUTH2 authentication method in Gmail. 

  - NTLM authentication support with the ntlm library.

  - Added the '/tls1_3' flag for servers that support it.

  - Add the 'g' option to the select command that works in     IMAP servers that implement the X-GM-EXT-1 capability     (such as the one offered by Gmail).

  - Added '/auth=XYZ' to the way to define a server. This     allows users to select the method to authenticate to an     IMAP, SMTP or POP3 server. Examples are /auth=plain, or     /auth=gssapi, etc.

  - When a message is of type multipart/mixed, and its first     part is multipart/signed, Alpine will include the text     of the original message in a reply message, instead of     including a multipart attachment.

  - Added backward search in the index screen.

  - pico: Add -dict option to Pico, which allows users to     choose a dictionary when spelling.

  - Drop /usr/bin/mailutil, it is not built by default     anymore.

  - Added Quota subcommands for printing, forwarding,     saving, etc.

2.23 fixes CVE-2020-14929 (#1850048,#1850047) and new version (#1848786)

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

CVE-2020-14929

Alpine before 2.23 silently proceeds to use an insecure connection after a /tls is sent in certain circumstances involving PREAUTH, which is a less secure behavior than the alternative of closing the connection and letting the user decide what they would like to do.

For Debian 8 'Jessie', this problem has been fixed in version 2.11+dfsg1-3+deb8u1.

We recommend that you upgrade your alpine packages.

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

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
403481	Alpine: multiple alpine packages: security update to 2.23-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
403481	Alpine: multiple alpine packages: security update to 2.23-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
400262	Alpine: multiple alpine packages: security update to 2.23.2-r0 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	high
400262	Alpine: multiple alpine packages: security update to 2.23.2-r0 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
149594	openSUSE Security Update : alpine (openSUSE-2021-675)	Nessus	SuSE Local Security Checks	high
138122	Fedora 31 : alpine (2020-f822ea9330)	Nessus	Fedora Local Security Checks	high
138111	Fedora 32 : alpine (2020-386249cec2)	Nessus	Fedora Local Security Checks	high
137841	Debian DLA-2254-1 : alpine security update	Nessus	Debian Local Security Checks	high

Detections

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CVE-2020-14929

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