CVE-2011-0411: Command Injection
The STARTTLS implementation in Postfix 2.4.x before 2.4.16, 2.5.x before 2.5.12, 2.6.x before 2.6.9, and 2.7.x before 2.7.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2011-0411?
CVE-2011-0411 is rated as a high severity vulnerability due to its potential for man-in-the-middle attacks.
How do I fix CVE-2011-0411?
To fix CVE-2011-0411, upgrade Postfix to version 2.4.16 or later, or 2.5.12 or later, or 2.6.9 or later, or 2.7.3 or later.
What software versions are affected by CVE-2011-0411?
CVE-2011-0411 affects Postfix versions 2.4.x before 2.4.16, 2.5.x before 2.5.12, 2.6.x before 2.6.9, and 2.7.x before 2.7.3.
What type of attack does CVE-2011-0411 exploit?
CVE-2011-0411 exploits the STARTTLS implementation flaw in Postfix, allowing man-in-the-middle attackers to inject commands into encrypted SMTP sessions.
Who is impacted by CVE-2011-0411?
Organizations using the affected versions of Postfix for email services are at risk if they don't update to the fixed versions.