Multiple vulnerabilities in PHP

Published: 2023-08-06 | Updated: 2024-04-17

Risk	Critical
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-3823 CVE-2023-3824
CWE-ID	CWE-611 CWE-119
Exploitation vector	Network
Public exploit	Vulnerability #2 is being exploited in the wild.
Vulnerable software Subscribe	PHP Universal components / Libraries / Scripting languages
Vendor	PHP Group

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) XML External Entity injection

EUVDB-ID: #VU78977

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-3823

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PHP: 7.4 - 8.2.8

External links

http://www.php.net/ChangeLog-8.php#8.0.30
http://github.com/php/php-src/security/advisories/GHSA-3qrf-m4j2-pcrr
http://www.php.net/ChangeLog-8.php#8.1.22

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.

2) Buffer overflow

EUVDB-ID: #VU78978

Risk: Critical

CVSSv3.1: 7.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-3824

CWE-ID: CWE-119 - Memory corruption