RHSA-2015:1666: Moderate: httpd24-httpd security update

The httpd packages provide the Apache HTTP Server, a powerful, efficient,and extensible web server.Multiple flaws were found in the way httpd parsed HTTP requests andresponses using chunked transfer encoding. A remote attacker could usethese flaws to create a specially crafted request, which httpd would decodedifferently from an HTTP proxy software in front of it, possibly leading toHTTP request smuggling attacks. (CVE-2015-3183)It was discovered that in httpd 2.4, the internal API functionapsomeauthrequired() could incorrectly indicate that a request wasauthenticated even when no authentication was used. An httpd module usingthis API function could consequently allow access that should have beendenied. (CVE-2015-3185)Note: This update introduces new a new API function,apsomeauthnrequired(), which correctly indicates if a request isauthenticated. External httpd modules using the old API function should bemodified to use the new one to completely resolve this issue.A denial of service flaw was found in the way the modlua httpd moduleprocessed certain WebSocket Ping requests. A remote attacker could send aspecially crafted WebSocket Ping packet that would cause the httpd childprocess to crash. (CVE-2015-0228)A NULL pointer dereference flaw was found in the way httpd generatedcertain error responses. A remote attacker could possibly use this flaw tocrash the httpd child process using a request that triggers a certain HTTPerror. (CVE-2015-0253)All httpd24-httpd users are advised to upgrade to these updated packages,which contain backported patches to correct these issues. After installingthe updated packages, the httpd24-httpd service will be restartedautomatically.