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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1724 Moderate: httpd security and bug fix update 12 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: httpd Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Red Hat Enterprise Linux WS/Desktop 6 Impact/Access: Provide Misleading Information -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-8743 Reference: ESB-2017.0127 Original Bulletin: https://access.redhat.com/errata/RHSA-2017:1721 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: httpd security and bug fix update Advisory ID: RHSA-2017:1721-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:1721 Issue date: 2017-07-11 CVE Names: CVE-2016-8743 ===================================================================== 1. Summary: An update for httpd is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, 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 the HTTP parser in httpd incorrectly allowed certain characters not permitted by the HTTP protocol specification to appear unencoded in HTTP request headers. If httpd was used in conjunction with a proxy or backend server that interpreted those characters differently, a remote attacker could possibly use this flaw to inject data into HTTP responses, resulting in proxy cache poisoning. (CVE-2016-8743) Note: The fix for the CVE-2016-8743 issue causes httpd to return "400 Bad Request" error to HTTP clients which do not strictly follow HTTP protocol specification. A newly introduced configuration directive "HttpProtocolOptions Unsafe" can be used to re-enable the old less strict parsing. However, such setting also re-introduces the CVE-2016-8743 issue. Note: Administrators of Red Hat Satellite 5 and Red Hat Satellite Proxy 5 systems should consult Red Hat Knowledgebase article 3013361 linked to in the Reference section before installing this update. Bug Fix(es): * Previously, httpd was unable to correctly check a boundary of an array, and in rare cases it attempted to access an element of an array that was out of bounds. Consequently, httpd terminated unexpectedly with a segmentation fault at proxy_util.c. With this update, bounds checking has been fixed, and httpd no longer crashes. (BZ#1463354) 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/): 1406822 - CVE-2016-8743 httpd: Apache HTTP Request Parsing Whitespace Defects 1463354 - segfault in ap_proxy_set_scoreboard_lb 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: httpd-2.2.15-60.el6_9.4.src.rpm i386: httpd-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-tools-2.2.15-60.el6_9.4.i686.rpm x86_64: httpd-2.2.15-60.el6_9.4.x86_64.rpm httpd-debuginfo-2.2.15-60.el6_9.4.x86_64.rpm httpd-tools-2.2.15-60.el6_9.4.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): i386: httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm mod_ssl-2.2.15-60.el6_9.4.i686.rpm noarch: httpd-manual-2.2.15-60.el6_9.4.noarch.rpm x86_64: httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.x86_64.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.x86_64.rpm mod_ssl-2.2.15-60.el6_9.4.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: httpd-2.2.15-60.el6_9.4.src.rpm x86_64: httpd-2.2.15-60.el6_9.4.x86_64.rpm httpd-debuginfo-2.2.15-60.el6_9.4.x86_64.rpm httpd-tools-2.2.15-60.el6_9.4.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional (v. 6): noarch: httpd-manual-2.2.15-60.el6_9.4.noarch.rpm x86_64: httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.x86_64.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.x86_64.rpm mod_ssl-2.2.15-60.el6_9.4.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: httpd-2.2.15-60.el6_9.4.src.rpm i386: httpd-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm httpd-tools-2.2.15-60.el6_9.4.i686.rpm mod_ssl-2.2.15-60.el6_9.4.i686.rpm noarch: httpd-manual-2.2.15-60.el6_9.4.noarch.rpm ppc64: httpd-2.2.15-60.el6_9.4.ppc64.rpm httpd-debuginfo-2.2.15-60.el6_9.4.ppc.rpm httpd-debuginfo-2.2.15-60.el6_9.4.ppc64.rpm httpd-devel-2.2.15-60.el6_9.4.ppc.rpm httpd-devel-2.2.15-60.el6_9.4.ppc64.rpm httpd-tools-2.2.15-60.el6_9.4.ppc64.rpm mod_ssl-2.2.15-60.el6_9.4.ppc64.rpm s390x: httpd-2.2.15-60.el6_9.4.s390x.rpm httpd-debuginfo-2.2.15-60.el6_9.4.s390.rpm httpd-debuginfo-2.2.15-60.el6_9.4.s390x.rpm httpd-devel-2.2.15-60.el6_9.4.s390.rpm httpd-devel-2.2.15-60.el6_9.4.s390x.rpm httpd-tools-2.2.15-60.el6_9.4.s390x.rpm mod_ssl-2.2.15-60.el6_9.4.s390x.rpm x86_64: httpd-2.2.15-60.el6_9.4.x86_64.rpm httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.x86_64.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.x86_64.rpm httpd-tools-2.2.15-60.el6_9.4.x86_64.rpm mod_ssl-2.2.15-60.el6_9.4.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: httpd-2.2.15-60.el6_9.4.src.rpm i386: httpd-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm httpd-tools-2.2.15-60.el6_9.4.i686.rpm mod_ssl-2.2.15-60.el6_9.4.i686.rpm noarch: httpd-manual-2.2.15-60.el6_9.4.noarch.rpm x86_64: httpd-2.2.15-60.el6_9.4.x86_64.rpm httpd-debuginfo-2.2.15-60.el6_9.4.i686.rpm httpd-debuginfo-2.2.15-60.el6_9.4.x86_64.rpm httpd-devel-2.2.15-60.el6_9.4.i686.rpm httpd-devel-2.2.15-60.el6_9.4.x86_64.rpm httpd-tools-2.2.15-60.el6_9.4.x86_64.rpm mod_ssl-2.2.15-60.el6_9.4.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-2016-8743 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/articles/3013361 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZZTZgXlSAg2UNWIIRAmdtAKCb1+uCNxZKEdVFN8Ohs6S70a97ZwCgrpLu X7emHhZW/Hs3jqMvNGPpHz4= =OM/N - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWWWuj4x+lLeg9Ub1AQhJCg/8Dt2tvHMBVRfDv9N+7tF/PH8k18AW79ij /Idbr3CRVuh9V6YkJl7Z/rEYi9MeQx21OjFyLP7gaDSH2c6fnVX8fjYzZAhJgQkh F6MIfSdP7kfF5yY9daWsQ2C0lmMNH/oX2emLQYbzqyf8G8do+epBtIe6jZiFvgcb muVNRnRehTwuIjiBeKLwTDcccEfaTyWktw2lUhMBTCp63bJoTBaEBpF8M2iwU0DS nV9NT1eoGsjEMR6JzM08FCvnseTE0uLD9X9e8hZu7tN9cle32xQ6G7W3L/gcJdrq 7kI4X3AyArpPIBOOO2/EFDPk1WdVV1xf+DEEu/S/8SGGhst5jLA97CSlJuXsDhj1 17vcesLmUCUwpr389J5a93tIeZxitGL9SY77+7jirR26UhRUY/13GvHTFAGEsjA1 +ceTihC3cmchFXcJ4EDmR3fYMunM91odxEKmmw51lGQvWav24AmMKQBKYkvzFFgt SYdvoHa99tnFHG1nPvOKOGf+I1oi4L/ePhzLrzfEyCd3jW4QY2uVxCynrrlobzpY RMQ3h8EGrPS7ojWqroLYhbxwQCyI7t0XRiDSfCJgvWyhASpqvFsO4ZQOt0eQw6yw d8KRkj6j6qvsmAhIX8oJF2dAOItRV4Ulp4jI+phz7N/ZvBlFjfsAc1IoKRGRuJxS CNgisGZJyqQ= =0Nwn -----END PGP SIGNATURE-----