CVSS: 7.5EPSS: 1%CPEs: 17EXPL: 1CVE-2016-0736 – Apache mod_session_crypto - Padding Oracle
https://notcve.org/view.php?id=CVE-2016-0736
In Apache HTTP Server versions 2.4.0 to 2.4.23, mod_session_crypto was encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This made it vulnerable to padding oracle attacks, particularly with CBC. En Apache HTTP Server versiones 2.4.0 hasta 2.4.23, mod_session_crypto fue cifraba su cookie y datos utilizando los cifrados configurados posiblemente con los modos de operación CBC o ECB (AES256-CBC por defecto), por lo tanto, no se puede seleccionar ni crear cifrado autenticado integrado. Esto lo hizo vulnerable a los ataques de tipo oráculo de relleno (padding oracle), particularmente con CBC. It was discovered that the mod_session_crypto module of httpd did not use any mechanisms to verify integrity of the encrypted session data stored in the user's browser. • https://www.exploit-db.com/exploits/40961 http://rhn.redhat.com/errata/RHSA-2017-1415.html http://www.debian.org/security/2017/dsa-3796 http://www.securityfocus.com/bid/95078 http://www.securitytracker.com/id/1037508 https://access.redhat.com/errata/RHSA-2017:0906 https://access.redhat.com/errata/RHSA-2017:1161 https://access.redhat.com/errata/RHSA-2017:1413 https://access.redhat.com/errata/RHSA-2017:1414 https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocal • CWE-287: Improper Authentication CWE-310: Cryptographic Issues •
CVSS: 7.5EPSS: 3%CPEs: 7EXPL: 2CVE-2016-8740 – Apache 2.4.23 mod_http2 - Denial of Service
https://notcve.org/view.php?id=CVE-2016-8740
The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request. El módulo mod_http2 en el Apache HTTP Server 2.4.17 hasta la versión 2.4.23, cuando la configuración Protocols incluye h2 o h2c, no restringe la longitud de la cabecera de petición, lo que permite a atacantes remotos provocar una denegación de servicio (corrupción de memoria) a través de marcos CONTINUATION manipulados en una petición HTTP/2. A vulnerability was found in httpd's handling of the LimitRequestFields directive in mod_http2, affecting servers with HTTP/2 enabled. An attacker could send crafted requests with headers larger than the server's available memory, causing httpd to crash. • https://www.exploit-db.com/exploits/40909 http://packetstormsecurity.com/files/140023/Apache-HTTPD-Web-Server-2.4.23-Memory-Exhaustion.html http://rhn.redhat.com/errata/RHSA-2017-1415.html http://www.securityfocus.com/bid/94650 http://www.securitytracker.com/id/1037388 https://access.redhat.com/errata/RHSA-2017:1161 https://access.redhat.com/errata/RHSA-2017:1413 https://access.redhat.com/errata/RHSA-2017:1414 https://github.com/apache/httpd/commit/29c63b786ae028d82405421585e91283c8fa0da3 • CWE-20: Improper Input Validation CWE-399: Resource Management Errors CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 8.1EPSS: 17%CPEs: 52EXPL: 0CVE-2016-5387 – HTTPD: sets environmental variable based on user supplied Proxy request header
https://notcve.org/view.php?id=CVE-2016-5387
The Apache HTTP Server through 2.4.23 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY environment variable, which might allow remote attackers to redirect an application's outbound HTTP traffic to an arbitrary proxy server via a crafted Proxy header in an HTTP request, aka an "httpoxy" issue. NOTE: the vendor states "This mitigation has been assigned the identifier CVE-2016-5387"; in other words, this is not a CVE ID for a vulnerability. El Apache HTTP Server hasta la versión 2.4.23 sigue a RFC 3875 sección 4.1.18 y por lo tanto no protege aplicaciones de la presencia de datos de clientes no confiables en ambiente variable de HTTP_PROXY, lo que puede permitir a atacantes remotos redireccionar el tráfico HTTP saliente de aplicación a un servidor proxy arbitrario a través de una cabecera Proxy manipulada en una petición HTTP, también conocido como problema "httpoxy". NOTA: el vendedor afirma "Se ha asignado a esta mitigación el identificador CVE-2016-5387"; en otras palabras, esto no es un CVE ID para una vulnerabilidad. 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. • http://lists.opensuse.org/opensuse-updates/2016-07/msg00059.html http://rhn.redhat.com/errata/RHSA-2016-1624.html http://rhn.redhat.com/errata/RHSA-2016-1625.html http://rhn.redhat.com/errata/RHSA-2016-1648.html http://rhn.redhat.com/errata/RHSA-2016-1649.html http://rhn.redhat.com/errata/RHSA-2016-1650.html http://www.debian.org/security/2016/dsa-3623 http://www.kb.cert.org/vuls/id/797896 http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html • CWE-20: Improper Input Validation •
CVSS: 5.9EPSS: 4%CPEs: 2EXPL: 0CVE-2016-1546 – httpd: mod_http2 denial-of-service by thread starvation
https://notcve.org/view.php?id=CVE-2016-1546
The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows. El servidor HTTP Apache 2.4.17 y 2.4.18, cuando mod_http2 está activado, no limita el número de trabajadores de flujo simultáneos para una sola conexión HTTP/2, lo que permite a atacantes remotos provocar una denegación de servicio (corte de flujo de procesamiento) a través de las ventanas de control de flujo modificadas. A denial of service flaw was found in httpd's mod_http2 module. A remote attacker could use this flaw to block server threads for long times, causing starvation of worker threads, by manipulating the flow control windows on streams. • http://httpd.apache.org/security/vulnerabilities_24.html http://svn.apache.org/viewvc?view=revision&revision=1733727 http://www.apache.org/dist/httpd/CHANGES_2.4 http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html http://www.securityfocus.com/bid/92331 https://access.redhat.com/errata/RHSA-2017:1161 https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache&# • CWE-399: Resource Management Errors •
CVSS: 9.1EPSS: 0%CPEs: 3EXPL: 0CVE-2016-4979 – httpd: X509 client certificate authentication bypass using HTTP/2
https://notcve.org/view.php?id=CVE-2016-4979
The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the "SSLVerifyClient require" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation. El servidor HTTP Apache 2.4.18 hasta la versión 2.4.20, cuando mod_http2 y mod_ssl están activados, no reconoce adecuadamente la directiva "SSLVerifyClient require" para autorización de petición HTTP/2, lo que permite a atacantes remotos eludir las restricciones destinadas al acceso aprovechando la capacidad de enviar múltiples peticiones sobre una sola conexión y abortar una renegociación. 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. • http://httpd.apache.org/security/vulnerabilities_24.html http://packetstormsecurity.com/files/137771/Apache-2.4.20-X509-Authentication-Bypass.html http://seclists.org/fulldisclosure/2016/Jul/11 http://www.apache.org/dist/httpd/CHANGES_2.4 http://www.openwall.com/lists/oss-security/2016/07/05/5 http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html http://www.securityfocus.com/bid/91566 http: • CWE-284: Improper Access Control CWE-287: Improper Authentication •