[USN-7360-1] Alpine vulnerabilities

[Bruce Cable]

==========================================================================
Ubuntu Security Notice USN-7360-1
March 20, 2025

alpine vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Alpine.

Software Description:
- alpine: Text-based email client, friendly for novices but powerful

Details:

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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS
   alpine                          2.22+dfsg1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   alpine-pico                     2.22+dfsg1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pilot                           2.22+dfsg1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 18.04 LTS
   alpine                          2.21+dfsg1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   alpine-pico                     2.21+dfsg1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pilot                           2.21+dfsg1-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   alpine                          2.20+dfsg1-2ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   alpine-pico                     2.20+dfsg1-2ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   pilot                           2.20+dfsg1-2ubuntu0.1~esm1
                                   Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-7360-1
   CVE-2020-14929, CVE-2021-38370, CVE-2021-46853

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