Unscored severity · published Dec 29, 2014
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…
–
CVSS
7.8%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)7.8% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NG
Nginx · F5
1.5.6 before 1.6.1; 1.7.0 before 1.7.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2014-3556
CVE.org
https://www.cve.org/CVERecord?id=CVE-2014-3556
Patch
http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html
Issue Tracking
http://marc.info/?l=bugtraq&m=142103967620673&w=2
Patch
http://nginx.org/download/patch.2014.starttls.txt
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1126891
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