USN-6591-2: Postfix update
USN-6591-1 fixed vulnerabilities in Postfix. A fix with less risk of regression has been made available since the last update. This update updates the fix and aligns with the latest configuration guidelines regarding this vulnerability. We apologize for the inconvenience. Original advisory details: Timo Longin discovered that Postfix incorrectly handled certain email line endings. A remote attacker could possibly use this issue to bypass an email authentication mechanism, allowing domain spoofing and potential spamming. Please note that certain configuration changes are required to address this issue. They are not enabled by default for backward compatibility. Information can be found at https://www.postfix.org/smtp-smuggling.html.
Affected Software
Event History
Frequently Asked Questions
What is the severity of USN-6591-2?
The severity of USN-6591-2 is classified as medium, indicating a moderate risk to users.
How do I fix USN-6591-2?
To fix USN-6591-2, upgrade Postfix to the recommended version for your Ubuntu release.
What does USN-6591-2 address?
USN-6591-2 addresses vulnerabilities in Postfix and provides a more stable fix to prevent regression.
Which Ubuntu versions are affected by USN-6591-2?
USN-6591-2 affects multiple Ubuntu versions including 14.04, 16.04, 18.04, 20.04, 22.04, and 23.10.
Is USN-6591-2 related to any specific vulnerabilities?
Yes, USN-6591-2 is related to CVE-2023-51764, which is one of the vulnerabilities it aims to mitigate.