Scientific Linux Security Update : httpd on SL7.x x86_64 (httpoxy)

Medium Nessus Plugin ID 92404


The remote Scientific Linux host is missing one or more security updates.


Security Fix(es) :

- It was discovered that httpd 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.

Note: After this update, httpd will no longer pass the value of the Proxy request header to scripts via the HTTP_PROXY environment variable.

Bug Fix(es) :

- In a caching proxy configuration, the mod_cache module would treat content as stale if the Expires header changed when refreshing a cached response. As a consequence, an origin server returning content without a fixed Expires header would not be treated as cacheable. The mod_cache module has been fixed to ignore changes in the Expires header when refreshing content.
As a result, such content is now cacheable, improving performance and reducing load at the origin server.

- The HTTP status code 451 'Unavailable For Legal Reasons' was not usable in the httpd configuration. As a consequence, modules such as mod_rewrite could not be configured to return a 451 error if required for legal purposes. The 451 status code has been added to the list of available error codes, and modules can now be configured to return a 451 error if required.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 92404

File Name: sl_20160718_httpd_on_SL7_x.nasl

Version: $Revision: 2.6 $

Type: local

Agent: unix

Published: 2016/07/19

Modified: 2017/06/29

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P


Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2016/07/18

Reference Information

CVE: CVE-2016-5387