CVE-2020-7065
HIGH severity · CVSS 7.4 · CWE-121
7.4CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)5%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://bugs.php.net/bug.php?id=79371 ↗
Additional information
- NVD record
- https://bugs.php.net/bug.php?id=79371Patch
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch
- https://www.php.net/ChangeLog-7.php#7.4.4Advisory
- 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.tenable.com/security/tns-2021-14Advisory