Public Date:
1353809: CVE-2016-5388 Tomcat: CGI sets environmental variable based on user supplied Proxy request header
It was discovered that tomcat used the value of the Proxy header from HTTP requests to initialize the HTTP_PROXY environment variable for CGI scripts, which in turn was incorrectly used by certain HTTP client implementations to configure the proxy for outgoing HTTP requests. A remote attacker could possibly use this flaw to redirect HTTP requests performed by a CGI script to an attacker-controlled proxy via a malicious HTTP request.

Find out more about CVE-2016-5388 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 2.6
Base Metrics AV:N/AC:H/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None

CVSS v3 metrics

CVSS3 Base Score 3.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality None
Integrity Impact Low
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (tomcat6) RHSA-2016:2045 2016-10-10
Red Hat Enterprise Linux 7 (tomcat) RHSA-2016:2046 2016-10-10
Red Hat JBoss Web Server 3.0 for RHEL 6 RHSA-2016:1636 2016-08-18
Red Hat JBoss Web Server 3.0 RHSA-2016:1624 2016-08-17
Red Hat JBoss Web Server 3.0 for RHEL 7 RHSA-2016:1635 2016-08-18

Affected Packages State

Platform Package State
Red Hat JBoss EWS 2 tomcat8 Will not fix
Red Hat JBoss EWS 2 tomcat7 Will not fix
Red Hat JBoss EWS 1 tomcat Will not fix
Red Hat JBoss EAP 6 Tomcat Will not fix
Red Hat JBoss EAP 5 jbossas Will not fix
Red Hat Enterprise Linux 5 tomcat5 Will not fix
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank Scott Geary (VendHQ) for reporting this issue.
Last Modified