Vulnerability CVE-2011-1431
Published: 2011-03-16   Modified: 2012-02-13

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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Plaintext injection in STARTTLS (multiple implementations)
Wietse Venema
18.03.2011

Type:

CWE-Other

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Frederik vermeulen -> Netqmail 

 References:
http://www.kb.cert.org/vuls/id/MAPG-8D9M5Q
http://www.kb.cert.org/vuls/id/555316
http://inoa.net/qmail-tls/vu555316.patch
http://xforce.iss.net/xforce/xfdb/65932
http://www.vupen.com/english/advisories/2011/0612
http://www.securityfocus.com/bid/46767
http://www.securityfocus.com/archive/1/516901
http://www.postfix.org/CVE-2011-0411.html
http://securityreason.com/securityalert/8144
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