CVE-2020-7065
HIGHCVSS 8.8/10EPSS 4.74%
Last modified
CVE-2020-7065 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 4.74% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Php | Php | >= 7.3.0, < 7.3.16 |
| Php | Php | >= 7.4.0, < 7.4.4 |
| Debian | Debian Linux | 10.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 19.10 |
| Canonical | Ubuntu Linux | 20.04 |
| Tenable | Tenable.Sc | < 5.19.0 |
References
- https://bugs.php.net/bug.php?id=79371Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20200403-0001/Third Party Advisory
- https://usn.ubuntu.com/4330-1/Third Party Advisory
- https://usn.ubuntu.com/4330-2/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4719Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://www.php.net/ChangeLog-7.php#7.4.4Release Notes, Vendor Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
- https://bugs.php.net/bug.php?id=79371Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20200403-0001/Third Party Advisory
- https://usn.ubuntu.com/4330-1/Third Party Advisory
- https://usn.ubuntu.com/4330-2/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4719Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://www.php.net/ChangeLog-7.php#7.4.4Release Notes, Vendor Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-7065?
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 severe is CVE-2020-7065?
CVE-2020-7065 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.74% probability of exploitation in the next 30 days.
How do I fix CVE-2020-7065?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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- CVE-2020-7063In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7…5.3
- CVE-2020-7064In PHP versions 7.2.x below 7.2.9, 7.3.x below 7.3.16 and 7.…5.4
- CVE-2020-7066In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7…4.3
- CVE-2020-7067In PHP versions 7.2.x below 7.2.30, 7.3.x below 7.3.17 and 7…7.5
- CVE-2020-7068In PHP versions 7.2.x below 7.2.33, 7.3.x below 7.3.21 and 7…3.6
- CVE-2020-7069In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7…6.5
- CVE-2020-7070In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7…5.3
- CVE-2020-7071In PHP versions 7.3.x below 7.3.26, 7.4.x below 7.4.14 and 8…5.3
Are you affected by CVE-2020-7065?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST