| Package | Affected versions | Patched versions |
|---|---|---|
| postfix | = 2.4= 2.4.0= 2.4.1= 2.4.10= 2.4.11= 2.4.12= 2.4.13= 2.4.14= 2.4.15= 2.4.2= 2.4.3= 2.4.4= 2.4.5= 2.4.6= 2.4.7= 2.4.8= 2.4.9= 2.5.0= 2.5.1= 2.5.10= 2.5.11= 2.5.2= 2.5.3= 2.5.4= 2.5.5= 2.5.6= 2.5.7= 2.5.8= 2.5.9= 2.6= 2.6.0= 2.6.1= 2.6.2= 2.6.3= 2.6.4= 2.6.5= 2.6.6= 2.6.7= 2.6.8= 2.7.0= 2.7.1= 2.7.2 |
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.
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