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Red Hat Security Advisory 2016-1624-01

Red Hat Security Advisory 2016-1624-01
Posted Aug 17, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1624-01 - This release of Red Hat JBoss Web Server 3.0.3 Service Pack 1 serves as a update for Red Hat JBoss Web Server 3.0.3 httpd and tomcat. Security Fix: 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.

tags | advisory, remote, web, cgi
systems | linux, redhat
advisories | CVE-2016-5387, CVE-2016-5388
SHA-256 | ca7ccdac8b6da50eb2b2518f63459ecd23735de90547e027d6dc0d4318c75e65

Red Hat Security Advisory 2016-1624-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: Red Hat JBoss Web Server 3.0.3 Service Pack 1 security update
Advisory ID: RHSA-2016:1624-01
Product: Red Hat JBoss Web Server
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1624.html
Issue date: 2016-08-17
CVE Names: CVE-2016-5387 CVE-2016-5388
=====================================================================

1. Summary:

Updated packages that provide Red Hat JBoss Web Server 3.0.3 Service Pack 1
and fixes two security issues and a bug with ajp processors are now
available for Solaris, and Microsoft Windows from the Customer Portal.

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.

2. Description:

This release of Red Hat JBoss Web Server 3.0.3 Service Pack 1 serves as a
update for Red Hat JBoss Web Server 3.0.3 httpd and tomcat.

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)

* It was discovered that tomcat 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-2016-5388)

Note: After this update, httpd 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.

3. Solution:

The References section of this erratum contains a download link (you must
log in to download the update). Before applying the update, back up your
existing Red Hat JBoss Web Server installation (including all applications
and configuration files).

After installing the updated packages, the httpd daemon will be restarted
automatically.

After installing the updated packages, follow the instructions in this
knowledgebase article to configure Tomcat:

https://access.redhat.com/solutions/2435491

4. Bugs fixed (https://bugzilla.redhat.com/):

1353755 - CVE-2016-5387 Apache HTTPD: sets environmental variable based on user supplied Proxy request header
1353809 - CVE-2016-5388 Tomcat: CGI sets environmental variable based on user supplied Proxy request header

5. References:

https://access.redhat.com/security/cve/CVE-2016-5387
https://access.redhat.com/security/cve/CVE-2016-5388
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=securityPatches&version=3.0.3
https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_Web_Server/3/html-single/3.0.3_Release_Notes/index.html
https://access.redhat.com/security/vulnerabilities/httpoxy
https://access.redhat.com/solutions/2435491

6. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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