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Ubuntu Security Notice USN-7604-2
June 30, 2025

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Sudo could be made to bypass host restrictions.

Software Description:
- sudo: Provide limited super user privileges to specific users

Details:

USN-7604-1 fixed CVE-2025-32462 in sudo. This update provides the
corresponding fixes for Ubuntu 20.04 LTS, Ubuntu 18.04 LTS,
Ubuntu 16.04 LTS, and Ubuntu 14.04 LTS.

Original advisory details:

Rich Mirch discovered that Sudo incorrectly handled the host option. In
environments where per-host rules are configured in the sudoers file, a
local attacker could use this issue to bypass the host restrictions.

Update instructions:

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

Ubuntu 20.04 LTS
  sudo                            1.8.31-1ubuntu1.5+esm1
                                  Available with Ubuntu Pro
  sudo-ldap                       1.8.31-1ubuntu1.5+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  sudo                            1.8.21p2-3ubuntu1.6+esm1
                                  Available with Ubuntu Pro
  sudo-ldap                       1.8.21p2-3ubuntu1.6+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  sudo                            1.8.16-0ubuntu1.10+esm3
                                  Available with Ubuntu Pro
  sudo-ldap                       1.8.16-0ubuntu1.10+esm3
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  sudo                            1.8.9p5-1ubuntu1.5+esm8
                                  Available with Ubuntu Pro
  sudo-ldap                       1.8.9p5-1ubuntu1.5+esm8
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7604-2
  https://ubuntu.com/security/notices/USN-7604-2
  CVE-2025-32462