CVE-2020-7061: heap-buffer-overflow in phar_extract_file

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-02-27 · updated 2026-06-17
Weakness: CWE-125

Description

In PHP versions 7.3.x below 7.3.15 and 7.4.x below 7.4.3, while extracting PHAR files on Windows using phar extension, certain content inside PHAR file could lead to one-byte read past the allocated buffer. This could potentially lead to information disclosure or crash.

Affected products

PHP: from 7.2.0 through 7.2.27; from 7.3.0 through 7.3.14; from 7.4.0 through 7.4.2
Tenable.sc: before 5.19.0 — fixed in 5.19.0

How to fix

Upgrade to a fixed version: Tenable.sc 5.19.0. Check the vendor advisory for mitigations.

References

https://bugs.php.net/bug.php?id=79171
https://security.gentoo.org/glsa/202003-57
https://www.tenable.com/security/tns-2021-14
https://bugs.php.net/bug.php?id=79171
https://security.gentoo.org/glsa/202003-57
https://www.tenable.com/security/tns-2021-14

Get alerted when CVE-2020-7061 or the next vulnerability affects your stack