Buffer over-read in PHP - CVE-2016-10161

Vulnerability identifier: #VU12908

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2016-10161

CWE-ID: CWE-126

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the object_common1 function in ext/standard/var_unserializer.c due to buffer over-read. A remote attacker can submit specially crafted serialized data that is mishandled in a finish_nested_data call and cause the service to crash.

PHP
Amazon Linux AMI
Gentoo Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
SUSE Linux
Slackware Linux
php5 (Ubuntu package)
php (Debian package)

Update to versions 5.6.30, 7.0.15 or 7.1.1.

php5 (Ubuntu package) - addressed in versions 5.3.10-1ubuntu3.26, 5.5.9+dfsg-1ubuntu4.21
php (Debian package) - update to 5.6.30+dfsg-0+deb8u1

• http://www.php.net/ChangeLog-5.php
• http://www.php.net/ChangeLog-7.php

• Red Hat update for php
• Debian update for php5
• Gentoo update for PHP
• Slackware Linux update for php
• Amazon Linux AMI update for php56
• Amazon Linux AMI update for php70
• Ubuntu update for PHP
• SUSE Linux update for php53