Out-of-bounds write in bzread() in PHP and Oracle Linux - CVE-2016-5399

Vulnerability identifier: #VU207

CSH Severity: High

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber

CVE-ID: CVE-2016-5399

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vendor: PHP Group
Oracle

Affected software:
PHP
Oracle Linux

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to incorrect error handling in bzread() function. A remote unauthenticated attacker can cause buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Install the latest versions: (5.5.38, 5.6.24, 7.0.9).

• https://bugs.php.net/bug.php?id=72613
• http://php.net/ChangeLog-5.php#5.5.38
• http://php.net/ChangeLog-5.php#5.6.24
• http://php.net/ChangeLog-7.php#7.0.9
• http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html