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

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

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.
(CVE-2016-5387)

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.

See also :

http://www.nessus.org/u?d0d2473b

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.1
(CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 92404 ()

Bugtraq ID:

CVE ID: CVE-2016-5387

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