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Alerts This Week
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Alerts This Week
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Red Hat 6/7: RHSA-2016-1420-01 Important: Remote Attack in httpd24

red hat
Calendar Grey July 18, 2016
Scroller Redhat
Vital announcement for Red Hat Software Collections tackles significant vulnerabilities found in httpd24-httpd server applications.
An update for httpd24-httpd is now available for Red Hat Software Collections

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

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

Summary

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
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.
* A flaw was found in the way httpd performed client authentication using X.509 client certificates. When the HTTP/2 protocol was enabled, a remote attacker could use this flaw to access resources protected by certificate authentication without providing a valid client certificate. (CVE-2016-4979)
Red Hat would like to thank Scott Geary (VendHQ) for reporting CVE-2016-5387 and Apache Software Foundation for reporting CVE-2016-4979. Upstream acknowledges Erki Aring (Liewenthal Electronics Ltd) as the original reporter of CVE-2016-4979.

Topics%20covered

Topics Covered

security advisory red hat remote access security impact httpd update httpd exploit

References

https://access.redhat.com/security/cve/CVE-2016-4979 https://access.redhat.com/security/cve/CVE-2016-5387 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/httpoxy https://access.redhat.com/solutions/2435501

Package List

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6):
Source: httpd24-httpd-2.4.18-11.el6.src.rpm
noarch: httpd24-httpd-manual-2.4.18-11.el6.noarch.rpm
x86_64: httpd24-httpd-2.4.18-11.el6.x86_64.rpm httpd24-httpd-debuginfo-2.4.18-11.el6.x86_64.rpm httpd24-httpd-devel-2.4.18-11.el6.x86_64.rpm httpd24-httpd-tools-2.4.18-11.el6.x86_64.rpm httpd24-mod_ldap-2.4.18-11.el6.x86_64.rpm httpd24-mod_proxy_html-2.4.18-11.el6.x86_64.rpm httpd24-mod_session-2.4.18-11.el6.x86_64.rpm httpd24-mod_ssl-2.4.18-11.el6.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6):
Source: httpd24-httpd-2.4.18-11.el6.src.rpm
noarch: httpd24-httpd-manual-2.4.18-11.el6.noarch.rpm
x86_64: httpd24-httpd-2.4.18-11.el6.x86_64.rpm httpd24-httpd-debuginfo-2.4.18-11.el6.x86_64.rpm httpd24-httpd-devel-2.4.18-11.el6.x86_64.rpm httpd24-httpd-tools-2.4.18-11.el6.x86_64.rpm httpd24-mod_ldap-2.4.18-11.el6.x86_64.rpm httpd24-mod_proxy_html-2.4.18-11.el6.x86_64.rpm httpd24-mod_session-2.4.18-11.el6.x86_64.rpm httpd24-mod_ssl-2.4.18-11.el6.x86_64.rpm
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7):
Source: httpd24-httpd-2.4.18-11.el6.src.rpm
noarch: httpd24-httpd-manual-2.4.18-11.el6.noarch.rpm
x86_64: httpd24-httpd-2.4.18-11.el6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:1420-01
Product: Red Hat Software Collections
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1420
Issue date: 2016-07-18

Topic

An update for httpd24-httpd is now available for Red Hat SoftwareCollections.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory red hat remote access security impact httpd update httpd exploit

Relevant Releases Architectures

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) - noarch, x86_64

Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Bugs Fixed

1352476 - CVE-2016-4979 httpd: X509 client certificate authentication bypass using HTTP/2

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

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