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CVE-2014-3556

CVE information

Published

8 years ago

Last Modified

1 year ago

CVSSv2.0 Severity

Medium

Impact Analysis

Description

The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and 1.6.x before 1.6.1 and 1.7.x before 1.7.4 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..

CVSSv2.0 Score

Severity
Medium
Base Score
6.8/10
Exploit Score
8.6/10
Access Vector
Network
Access Complexity
Medium
Authentication Required
None
Impact Score
6.4/10
Confidentiality Impact
Partial
Availability Impact
Partial
Integrity Impact
Partial

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
  Yes
1.7.0 1.7.4
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
  Yes
1.5.6 1.6.1