mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-7065US | high8.8 | — | ||
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-al… | ||||
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references
External citations — patches, advisories, analysis.
- https://bugs.php.net/bug.php?id=79371ADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2020-7065WEB
- https://security.netapp.com/advisory/ntap-20200403-0001/ADVISORY
- https://usn.ubuntu.com/4330-1/ADVISORY
- https://usn.ubuntu.com/4330-2/ADVISORY
- https://www.debian.org/security/2020/dsa-4719ADVISORY
- https://www.oracle.com/security-alerts/cpuoct2021.htmlADVISORY
- https://www.php.net/ChangeLog-7.php#7.4.4ADVISORY
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