OpenSMTPD vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• opensmtpd - secure, reliable, lean, and easy-to configure SMTP server

Details

It was discovered that OpenSMTPD incorrectly verified the sender’s or
receiver’s e-mail addresses under certain conditions. An attacker could
possibly use this vulnerability to execute arbitrary commands as root.
(CVE-2020-7247)

It was discovered that OpenSMTPD did not properly handle hardlinks under
certain conditions. An unprivileged local attacker could possibly use this
issue to obtain sensitive information. This issue only affected Ubuntu
16.04 ESM. (CVE-2020-8793)

It was discovered that OpenSMTPD mishandled certain input. A remote,
unauthenticated attacker could possibly use this vulnerability to execute
arbitrary shell commands as any non-root user. This issue only affected
Ubuntu 16.04 ESM. (CVE-2020-8794)