CVE-2016-4537

Name of the Vulnerable Software and Affected Versions PHP versions prior to 5.5.35 PHP versions 5.6.x prior to 5.6.21 PHP versions 7.x prior to 7.0.6

Description The issue is related to the bcpowmod function in PHP, which does not properly check input data. This allows remote attackers to cause a denial of service or possibly have other unspecified impacts via a crafted call to the function. The bcpowmod function is vulnerable when it accepts a negative integer for the scale argument.

Recommendations For PHP versions prior to 5.5.35, update to version 5.5.35 or later. For PHP versions 5.6.x prior to 5.6.21, update to version 5.6.21 or later. For PHP versions 7.x prior to 7.0.6, update to version 7.0.6 or later.