Ubuntu Security Update USN-7360-1: Alpine vulnerabilities

[LinuxBot]

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)

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