CVE-2021-36202 Vulnerability Analysis & Exploit Details

CVE-2021-36202
Vulnerability Scoring

8.4
/10
Severe Risk

Cybersecurity professionals consider CVE-2021-36202 an immediate threat requiring urgent mitigation.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-36202 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:13 UTC
Originally published on: 🕗 07 Apr 2022, 20:15 UTC

Time between publication and last update: 958 days

CVSS Release: version 3

CVSS3 Source

productsecurity@jci.com

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

CVE-2021-36202 Vulnerability Summary

CVE-2021-36202: Server-Side Request Forgery (SSRF) vulnerability in Johnson Controls Metasys could allow an authenticated attacker to inject malicious code into the MUI PDF export feature. This issue affects: Johnson Controls Metasys All 10 versions versions prior to 10.1.5; All 11 versions versions prior to 11.0.2.

Assessing the Risk of CVE-2021-36202

Access Complexity Graph

The exploitability of CVE-2021-36202 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2021-36202

This vulnerability, CVE-2021-36202, requires a high level of attack complexity and low privileges, making it difficult but not impossible to exploit. Organizations should ensure robust security configurations to mitigate risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2021-36202, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2021-36202, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2021-36202 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2021-36202 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: Low
    CVE-2021-36202 may slightly degrade system performance without fully affecting service availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.095% (probability of exploit)

EPSS Percentile: 42.32% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 57.68% of others.

CVE-2021-36202 References

External References

CWE Common Weakness Enumeration

CWE-918

CAPEC Common Attack Pattern Enumeration and Classification

  • Server Side Request Forgery CAPEC-664 An adversary exploits improper input validation by submitting maliciously crafted input to a target application running on a server, with the goal of forcing the server to make a request either to itself, to web services running in the server’s internal network, or to external third parties. If successful, the adversary’s request will be made with the server’s privilege level, bypassing its authentication controls. This ultimately allows the adversary to access sensitive data, execute commands on the server’s network, and make external requests with the stolen identity of the server. Server Side Request Forgery attacks differ from Cross Site Request Forgery attacks in that they target the server itself, whereas CSRF attacks exploit an insecure user authentication mechanism to perform unauthorized actions on the user's behalf.

Vulnerable Configurations

  • cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:10.1:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:10.1:*:*:*:lite:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:10.1:*:*:*:lite:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:11.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_application_and_data_server:11.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:10.1:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:11.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_extended_application_and_data_server:11.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_open_application_server:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_open_application_server:10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_open_application_server:10.1:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_open_application_server:10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_open_application_server:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_open_application_server:11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:johnsoncontrols:metasys_open_application_server:11.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:johnsoncontrols:metasys_open_application_server:11.0.1:*:*:*:*:*:*:*

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