7.5 - RHSA-2016:2598

Problem Description:

An update for php is now available for Red Hat Enterprise Linux 7.

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 Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Server.

Security Fix(es):

* A flaw was found in the way certain error conditions were handled by bzread() function in PHP. An attacker could use this flaw to upload a specially crafted bz2 archive which, when parsed via the vulnerable function, could cause the application to crash or execute arbitrary code with the permissions of the user running the PHP application. (CVE-2016-5399)

* An integer overflow flaw, leading to a heap-based buffer overflow was found in the imagecreatefromgd2() function of PHP's gd extension. A remote attacker could use this flaw to crash a PHP application or execute arbitrary code with the privileges of the user running that PHP application using gd via a specially crafted GD2 image. (CVE-2016-5766)

* An integer overflow flaw, leading to a heap-based buffer overflow was found in the gdImagePaletteToTrueColor() function of PHP's gd extension. A remote attacker could use this flaw to crash a PHP application or execute arbitrary code with the privileges of the user running that PHP application using gd via a specially crafted image buffer. (CVE-2016-5767)

* A double free flaw was found in the mb_ereg_replace_callback() function of php which is used to perform regex search. This flaw could possibly cause a PHP application to crash. (CVE-2016-5768)

Red Hat would like to thank Hans Jerry Illikainen for reporting CVE-2016-5399.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

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 must be restarted for the update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1073388 - ext/openssl: default_md algo is MD5 1131979 - Segfault running ZendFramework test suite (php_wddx_serialize_var) 1289457 - httpd segfault in php_module_shutdown when opcache loaded twice 1291667 - No TLS1.1 or TLS1.2 support for php curl module 1297179 - PHP crashes with [core:notice] [pid 3864] AH00052: child pid 95199 exit signal Segmentation fault (11) 1344578 - Segmentation fault while header_register_callback 1351068 - CVE-2016-5766 gd: Integer Overflow in _gd2GetHeader() resulting in heap overflow 1351069 - CVE-2016-5767 gd: Integer Overflow in gdImagePaletteToTrueColor() resulting in heap overflow 1351168 - CVE-2016-5768 php: Double free in _php_mb_regex_ereg_replace_exec 1358395 - CVE-2016-5399 php: Improper error handling in bzread()