CVE Vulnerability

CVE-2021-36766

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.

6.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

7.2 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
http://seclists.org/fulldisclosure/2021/Jul/36 Exploit Mailing List
http://packetstormsecurity.com/files/163564/Concrete5-8.5.5-Phar-Deserialization.html Exploit Third Party Advisory
https://hackerone.com/reports/1063039 Permissions Required Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*
Information

Published : 2021-07-30 02:15

Updated : 2021-09-22 04:56

NVD link : CVE-2021-36766

Mitre link : CVE-2021-36766

Products Affected
No products.
CWE
CWE-502

Deserialization of Untrusted Data