RCE in F5 nginx
CVE-2014-3556
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.078 (94.1th percentile) — read the EPSS interpretation.
Affected products
- F5 Nginx
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_HP, vendor-advisory, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Vendor Advisory, mailing-list, x_refsource_MLIST, Patch)
- secalert@redhat.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2014-3556?
- CVE-2014-3556 is a vulnerability in F5 nginx, classified under Command Injection. Published 2014-12-29.
- Is CVE-2014-3556 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.