Multiple vulnerabilities in PHP

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

CPE2.3

• cpe:2.3:a:php_group:php:7.4.33:*:*:*:*:*:*:
• cpe:2.3:a:php_group:php:8.0.29:*:*:*:*:*:*:
• cpe:2.3:a:php_group:php:8.1.21:*:*:*:*:*:*:
• cpe:2.3:a:php_group:php: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

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the phar_dir_read() function. A remote attacker can force the application to open a specially crafted .phar archive,  trigger memory corruption and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PHP: 7.4 - 8.2.8

CPE2.3

External links

http://www.php.net/ChangeLog-8.php#8.0.30
http://www.php.net/ChangeLog-8.php#8.1.22
http://github.com/php/php-src/security/advisories/GHSA-jqcx-ccgc-xwhv

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?

Yes. This vulnerability is being exploited in the wild.