PT-2014-11: Information Disclosure in nginx

(PT-2014-11) Positive Technologies Security Advisory
Information Disclosure in nginx

Vulnerable software

Version: 1.7.3 and earlier


Severity level

Severity level: Low
Impact: Information Disclosure
Access Vector: Local

CVSS v2:
Base Score: 1.9
Vector: (AV:L/AC:M/Au:N/C:P/I:N/A:N)

CVE: not assigned

Software description

nginx [engine x] is an HTTP and reverse proxy server, as well as a mail proxy server.

Vulnerability description

The specialists of the Positive Research center have detected an Information Disclosure vulnerability in nginx.

URI normalization function does not properly handle the transmitted values, thus an attacker can disclose memory areas using a web server log.

How to fix

Update your sofware up to the latest version

Advisory status

18.07.2014 - Vendor gets vulnerability details
05.08.2014 - Vendor releases fixed version and details
05.09.2014 - Public disclosure


The vulnerability was detected by Sergey Bobrov, Positive Research Center (Positive Technologies Company)


Reports on the vulnerabilities previously discovered by Positive Research:

About Positive Technologies

Positive Technologies is a leading provider of vulnerability assessment, compliance management and threat analysis solutions to more than 1,000 global enterprise clients. Our solutions work seamlessly across your entire business: securing applications in development; assessing your network and application vulnerabilities; assuring compliance with regulatory requirements; and blocking real-time attacks. Our commitment to clients and research has earned Positive Technologies a reputation as one of the foremost authorities on SCADA, Banking, Telecom, Web Application and ERP security, and distinction as the #1 fastest growing Security and Vulnerability Management firm in 2012, as shown in an IDC report*. To learn more about Positive Technologies please visit

*Source: IDC Worldwide Security and Vulnerability Management 2013-2017 Forecast and 2012 Vendor Shares, doc #242465, August 2013. Based on year-over-year revenue growth in 2012 for vendors with revenues of $20M+