Rapid7 Vulnerability & Exploit Database

Apache HTTPD: HTTP_PROXY environment variable "httpoxy" mitigation (CVE-2016-5387)

Back to Search

Apache HTTPD: HTTP_PROXY environment variable "httpoxy" mitigation (CVE-2016-5387)

Severity
5
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:P)
Published
07/18/2016
Created
07/25/2018
Added
07/27/2016
Modified
02/20/2020

Description

HTTP_PROXY is a well-defined environment variable in a CGI process, which collided with a number of libraries which failed to avoid colliding with this CGI namespace. A mitigation is provided for the httpd CGI environment to avoid populating the "HTTP_PROXY" variable from a "Proxy:" header, which has never been registered by IANA. This workaround and patch are documented in the ASF Advisory at asf-httpoxy-response.txt and incorporated in the 2.4.25 and 2.2.32 releases. Note: This is not assigned an httpd severity, as it is a defect in other software which overloaded well-established CGI environment variables, and does not reflect an error in HTTP server software.

Solution(s)

  • apache-httpd-upgrade-2_2_32
  • apache-httpd-upgrade-2_4_25

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;