Packages
- postfix - High-performance mail transport agent
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.
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.
Update instructions
After a standard system update you need to enable smtpd_forbid_bare_newline in your configuration and reload it to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 23.10 mantic | postfix – 3.8.1-2ubuntu0.1 | ||
| 22.04 jammy | postfix – 3.6.4-1ubuntu1.2 | ||
| 20.04 focal | postfix – 3.4.13-0ubuntu1.3 | ||
| 18.04 bionic | postfix – 3.3.0-1ubuntu0.4+esm2 | ||
| 16.04 xenial | postfix – 3.1.0-3ubuntu0.4+esm2 | ||
| 14.04 trusty | postfix – 2.11.0-1ubuntu1.2+esm2 | ||
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