-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: httpd security and bug fix update Advisory ID: RHSA-2016:1422-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2016:1422 Issue date: 2016-07-18 CVE Names: CVE-2016-5387 ===================================================================== 1. Summary: An update for httpd is now available for 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client Optional (v. 7) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: 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. Red Hat would like to thank Scott Geary (VendHQ) for reporting this issue. 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. (BZ#1347648) * 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. (BZ#1353269) 4. 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. 5. Bugs fixed (https://bugzilla.redhat.com/): 1347648 - Apache can not cache content if Expires header is modified 1353269 - Support sending http 451 status code from RewriteRule 1353755 - CVE-2016-5387 Apache HTTPD: sets environmental variable based on user supplied Proxy request header 6. Package List: Red Hat Enterprise Linux Client Optional (v. 7): Source: httpd-2.4.6-40.el7_2.4.src.rpm noarch: httpd-manual-2.4.6-40.el7_2.4.noarch.rpm x86_64: httpd-2.4.6-40.el7_2.4.x86_64.rpm httpd-debuginfo-2.4.6-40.el7_2.4.x86_64.rpm httpd-devel-2.4.6-40.el7_2.4.x86_64.rpm httpd-tools-2.4.6-40.el7_2.4.x86_64.rpm mod_ldap-2.4.6-40.el7_2.4.x86_64.rpm mod_proxy_html-2.4.6-40.el7_2.4.x86_64.rpm mod_session-2.4.6-40.el7_2.4.x86_64.rpm mod_ssl-2.4.6-40.el7_2.4.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): Source: httpd-2.4.6-40.el7_2.4.src.rpm noarch: httpd-manual-2.4.6-40.el7_2.4.noarch.rpm x86_64: httpd-2.4.6-40.el7_2.4.x86_64.rpm httpd-debuginfo-2.4.6-40.el7_2.4.x86_64.rpm httpd-devel-2.4.6-40.el7_2.4.x86_64.rpm httpd-tools-2.4.6-40.el7_2.4.x86_64.rpm mod_ldap-2.4.6-40.el7_2.4.x86_64.rpm mod_proxy_html-2.4.6-40.el7_2.4.x86_64.rpm mod_session-2.4.6-40.el7_2.4.x86_64.rpm mod_ssl-2.4.6-40.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: httpd-2.4.6-40.el7_2.4.src.rpm noarch: httpd-manual-2.4.6-40.el7_2.4.noarch.rpm ppc64: httpd-2.4.6-40.el7_2.4.ppc64.rpm httpd-debuginfo-2.4.6-40.el7_2.4.ppc64.rpm httpd-devel-2.4.6-40.el7_2.4.ppc64.rpm httpd-tools-2.4.6-40.el7_2.4.ppc64.rpm mod_ssl-2.4.6-40.el7_2.4.ppc64.rpm ppc64le: httpd-2.4.6-40.el7_2.4.ppc64le.rpm httpd-debuginfo-2.4.6-40.el7_2.4.ppc64le.rpm httpd-devel-2.4.6-40.el7_2.4.ppc64le.rpm httpd-tools-2.4.6-40.el7_2.4.ppc64le.rpm mod_ssl-2.4.6-40.el7_2.4.ppc64le.rpm s390x: httpd-2.4.6-40.el7_2.4.s390x.rpm httpd-debuginfo-2.4.6-40.el7_2.4.s390x.rpm httpd-devel-2.4.6-40.el7_2.4.s390x.rpm httpd-tools-2.4.6-40.el7_2.4.s390x.rpm mod_ssl-2.4.6-40.el7_2.4.s390x.rpm x86_64: httpd-2.4.6-40.el7_2.4.x86_64.rpm httpd-debuginfo-2.4.6-40.el7_2.4.x86_64.rpm httpd-devel-2.4.6-40.el7_2.4.x86_64.rpm httpd-tools-2.4.6-40.el7_2.4.x86_64.rpm mod_ssl-2.4.6-40.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: httpd-debuginfo-2.4.6-40.el7_2.4.ppc64.rpm mod_ldap-2.4.6-40.el7_2.4.ppc64.rpm mod_proxy_html-2.4.6-40.el7_2.4.ppc64.rpm mod_session-2.4.6-40.el7_2.4.ppc64.rpm ppc64le: httpd-debuginfo-2.4.6-40.el7_2.4.ppc64le.rpm mod_ldap-2.4.6-40.el7_2.4.ppc64le.rpm mod_proxy_html-2.4.6-40.el7_2.4.ppc64le.rpm mod_session-2.4.6-40.el7_2.4.ppc64le.rpm s390x: httpd-debuginfo-2.4.6-40.el7_2.4.s390x.rpm mod_ldap-2.4.6-40.el7_2.4.s390x.rpm mod_proxy_html-2.4.6-40.el7_2.4.s390x.rpm mod_session-2.4.6-40.el7_2.4.s390x.rpm x86_64: httpd-debuginfo-2.4.6-40.el7_2.4.x86_64.rpm mod_ldap-2.4.6-40.el7_2.4.x86_64.rpm mod_proxy_html-2.4.6-40.el7_2.4.x86_64.rpm mod_session-2.4.6-40.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: httpd-2.4.6-40.el7_2.4.src.rpm noarch: httpd-manual-2.4.6-40.el7_2.4.noarch.rpm x86_64: httpd-2.4.6-40.el7_2.4.x86_64.rpm httpd-debuginfo-2.4.6-40.el7_2.4.x86_64.rpm httpd-devel-2.4.6-40.el7_2.4.x86_64.rpm httpd-tools-2.4.6-40.el7_2.4.x86_64.rpm mod_ssl-2.4.6-40.el7_2.4.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: httpd-debuginfo-2.4.6-40.el7_2.4.x86_64.rpm mod_ldap-2.4.6-40.el7_2.4.x86_64.rpm mod_proxy_html-2.4.6-40.el7_2.4.x86_64.rpm mod_session-2.4.6-40.el7_2.4.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: 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 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFXjQl5XlSAg2UNWIIRAog3AJ4kSRr4UhlDqzVRUErGk5a6gH0fSgCgsWe5 aKj6hUMU0+4M7qT61Qr95pE= =UZcq -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce