CVE-2020-7065 HIGH

CVE-2020-7065: mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full

Vendor Php Group
Product PHP
Weakness CWE-121
Published April 1, 2020
Last update September 17, 2024
View on NVD All CVEs

CVSS base score

7.4/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

April 1, 2020 CVE published
September 17, 2024 Record updated