RHEL 6 / 7 : python-twisted-web (RHSA-2016:1978)

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


Synopsis :

The remote Red Hat host is missing a security update.

Description :

An update for python-twisted-web is now available for Red Hat
Enterprise Linux 6 and Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Twisted is an event-based framework for internet applications. Twisted
Web is a complete web server, aimed at hosting web applications using
Twisted and Python, but fully able to serve static pages too.

Security Fix(es) :

* It was discovered that python-twisted-web 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-2016-1000111)

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

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

See also :

https://www.redhat.com/security/data/cve/CVE-2016-1000111.html
http://rhn.redhat.com/errata/RHSA-2016-1978.html

Solution :

Update the affected python-twisted-web package.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 4.8
(CVSS2#E:F/RL:U/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 93826 ()

Bugtraq ID:

CVE ID: CVE-2016-1000111

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