Synopsis
Important: python-twisted-web security update
Type/Severity
Security Advisory: Important
Topic
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.
Description
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.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
Affected Products
-
Red Hat Enterprise Linux Server 7 x86_64
-
Red Hat Enterprise Linux Server 6 x86_64
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Red Hat Enterprise Linux Server 6 i386
-
Red Hat Enterprise Linux Server - Extended Update Support 7.6 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.5 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.4 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.3 x86_64
-
Red Hat Enterprise Linux Server - Extended Update Support 7.2 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.6 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.4 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.3 x86_64
-
Red Hat Enterprise Linux Server - AUS 7.2 x86_64
-
Red Hat Enterprise Linux Workstation 7 x86_64
-
Red Hat Enterprise Linux Workstation 6 x86_64
-
Red Hat Enterprise Linux Workstation 6 i386
-
Red Hat Enterprise Linux Desktop 7 x86_64
-
Red Hat Enterprise Linux Desktop 6 x86_64
-
Red Hat Enterprise Linux Desktop 6 i386
-
Red Hat Enterprise Linux for IBM z Systems 7 s390x
-
Red Hat Enterprise Linux for IBM z Systems 6 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.2 s390x
-
Red Hat Enterprise Linux for Power, big endian 7 ppc64
-
Red Hat Enterprise Linux for Power, big endian 6 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.2 ppc64
-
Red Hat Enterprise Linux for Power, little endian 7 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.5 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.4 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.2 ppc64le
-
Red Hat Enterprise Linux Server - TUS 7.6 x86_64
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Red Hat Enterprise Linux Server - TUS 7.3 x86_64
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Red Hat Enterprise Linux Server - TUS 7.2 x86_64
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Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.6 ppc64le
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.4 ppc64le
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.3 ppc64le
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.6 x86_64
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.4 x86_64
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.3 x86_64
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.2 x86_64
Fixes
- BZ - 1357345 - CVE-2016-1000111 Python Twisted: sets environmental variable based on user supplied Proxy request header
CVEs
References
Vulmon