Description
The STARTTLS implementation in qmail-smtpd.c in qmail-smtpd in the netqmail-1.06-tls patch for netqmail 1.06 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, a similar issue to CVE-2011-0411.
References
- multiple-starttls-command-execution(65932) vdb-entry
- http://www.kb.cert.org/vuls/id/MAPG-8D9M5Q
- http://inoa.net/qmail-tls/vu555316.patch
- http://www.postfix.org/CVE-2011-0411.html
- ADV-2011-0612 vdb-entry
- 46767 vdb-entry
- VU#555316 third-party-advisory
- 20110307 Plaintext injection in STARTTLS (multiple implementations) mailing-list
- 8144 third-party-advisory