STARTTLS Implementation Vulnerability in qmail-smtpd

CVE-2011-1431 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:P/A:P

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.

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