#VU26979 Out-of-bounds read in PHP - CVE-2020-7067

Vulnerability identifier: #VU26979

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-7067

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing untrusted input passed to urldecode() PHP function. A remote attacker can send specially crafted data to the application that uses the affected function and gain access to sensitive information on the system

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PHP: 7.2.0 - 7.2.29, 7.3.0alpha1 - 7.3.16, 7.4.0 - 7.4.4

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External links
https://www.php.net/ChangeLog-7.php#7.3.17
https://bugs.php.net/bug.php?id=79465

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.