CVE-2014-3556: f5 nginx Command Injection
Vulnerability summary
CVE-2014-3556 is a medium (CVSS 6.8) Command Injection vulnerability in f5 nginx. EPSS estimates a 7.83% chance of exploitation in the next 30 days, higher than 94.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 29-12-2014PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
7.83%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
0.00 pp
From 7.83% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- nginx< 1.6.1-1
F51 product
- nginx≥ 1.5.6, < 1.6.1 | ≥ 1.7.0, < 1.7.4
Ubuntu1 product
- nginx< 1.4.6-1ubuntu3
3 vendors · 3 products
References
7 links- marc.info?l=bugtraq&m=142103967620673&w=2Vendor AdvisoryX Refsource HPIssue TrackingThird Party Advisory
- mailman.nginx.org/pipermail/nginx-announce/2014/000144.htmlMailing ListX Refsource MLISTPatchVendor AdvisoryREPORT
