CVE-2020-7065

by using mb_strtolower() function with UTF-32LE encoding leads to potential code execution

Publication Date2020-04-01
SeverityHigh
TypeRemote Code Execution
Affected PHP Versions
  • 7.3.0 - 7.3.15
  • 7.4.0 - 7.4.3
Fixed Product Versions
  • ZendPHP 5.6
  • ZendPHP 7.1
  • ZendPHP 7.2
  • ZendPHP 7.3
  • ZendPHP 7.4
  • ZendServer 2019.0.5

CVE Details

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using the mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite a stack-allocated buffer. This could lead to memory corruption, crashes, and potentially code execution.

Recommendations

Upgrade to 7.3.16 or above, or 7.4.4 or above.