CVE-2017-3167 Red Hat Update for httpd (RHSA-2017:2478)

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

It was discovered that the httpd's mod_auth_digest module did not properly initialize memory before using it when processing certain headers related to digest authentication. A remote attacker could possibly use this flaw to disclose potentially sensitive information or cause httpd child process to crash by sending specially crafted requests to a server. (CVE-2017-9788)
It was discovered that the use of httpd's ap_get_basic_auth_pw() API function outside of the authentication phase could lead to authentication bypass. A remote attacker could possibly use this flaw to bypass required authentication if the API was used incorrectly by one of the modules used by httpd. (CVE-2017-3167)
A NULL pointer dereference flaw was found in the httpd's mod_ssl module. A remote attacker could use this flaw to cause an httpd child process to crash if another module used by httpd called a certain API function during the processing of an HTTPS request. (CVE-2017-3169) A buffer over-read flaw was found in the httpd's mod_mime module. A user permitted to modify httpd's MIME configuration could use this flaw to cause httpd child process to crash. (CVE-2017-7679)

Affected Products:
Red Hat Enterprise Linux Server 6 x86_64
Red Hat Enterprise Linux Server 6 i386
Red Hat Enterprise Linux Workstation 6 x86_64
Red Hat Enterprise Linux Workstation 6 i386
Red Hat Enterprise Linux Desktop 6 x86_64
Red Hat Enterprise Linux Desktop 6 i386
Red Hat Enterprise Linux for IBM z Systems 6 s390x
Red Hat Enterprise Linux for Power, big endian 6 ppc64
Red Hat Enterprise Linux for Scientific Computing 6 x86_64

A remote attacker could possibly use this flaw to disclose potentially sensitive information or cause httpd child process to crash by sending specially crafted requests to a server. (CVE-2017-9788)
A remote attacker could possibly use this flaw to bypass required authentication if the API was used incorrectly by one of the modules used by httpd. (CVE-2017-3167)
A remote attacker could use this flaw to cause an httpd child process to crash if another module used by httpd called a certain API function during the processing of an HTTPS request. (CVE-2017-3169)
A user permitted to modify httpd's MIME configuration could use this flaw to cause httpd child process to crash. (CVE-2017-7679)

Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

Refer to Red Hat security advisory RHSA-2017:2478 to address this issue and obtain more information.

Patch:
Following are links for downloading patches to fix the vulnerabilities:

RHSA-2017:2478: Red Hat Enterprise Linux