CVE-2020-7065
mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full
8.8
HIGH
CVSS 3.1
EPSS 5.0%
Description
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.
How to fix CVE-2020-7065
To remediate CVE-2020-7065, upgrade the affected package to a fixed version below.
- —upgrade to 7.3.16 or later
- —upgrade to 7.3.16 or later
- —upgrade to 7.3.16 or later
- —upgrade to 7.4.5-1 or later
Is CVE-2020-7065 being exploited?
Low — EPSS is 5.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 7.3.0, < 7.3.16, >= 7.4.0, < 7.4.4
- >= 7.3.0, < 7.3.16, >= 7.4.0, < 7.4.4
- >= 7.3.0, < 7.3.16, >= 7.4.0, < 7.4.4
- from 0, < 7.4.5-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |