CVE-2021-36766

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Concrete5 through 8.5.5 deserializes Untrusted Data. The vulnerable code is located within the controllers/single_page/dashboard/system/environment/logging.php Logging::update_logging() method. User input passed through the logFile request parameter is not properly sanitized before being used in a call to the file_exists() PHP function. This can be exploited by malicious users to inject arbitrary PHP objects into the application scope (PHP Object Injection via phar:// stream wrapper), allowing them to carry out a variety of attacks, such as executing arbitrary PHP code.

Concrete5 versiones hasta 8.5.5, deserializa Datos no Confiables. El código vulnerable se encuentra dentro del método controllers/single_page/dashboard/system/environment/logging.php en la función Logging::update_logging(). Una entrada del usuario que se pasa mediante el parámetro logFile request no es saneado apropiadamente antes de ser usada en una llamada a la función PHP file_exists(). Esto puede ser explotado por usuarios maliciosos para inyectar objetos PHP arbitrarios en el ámbito de la aplicación (PHP Object Injection por medio de phar:// stream wrapper), permitiéndoles llevar a cabo una variedad de ataques, como una ejecución de código PHP arbitrario

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-07-16 CVE Reserved
2021-07-20 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-08-29 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-502: Deserialization of Untrusted Data

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
http://packetstormsecurity.com/files/163564/Concrete5-8.5.5-Phar-Deserialization.html	2024-08-04
http://seclists.org/fulldisclosure/2021/Jul/36	2024-08-04

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Concretecms Search vendor "Concretecms"		Concrete Cms Search vendor "Concretecms" for product "Concrete Cms"				< 8.5.6 Search vendor "Concretecms" for product "Concrete Cms" and version " < 8.5.6"		-		Affected