CVE-2020-3531 Vulnerability Analysis & Exploit Details

Status: Analyzed - Last modified: 02 Dec 2020, 15:30 UTC Published: 18 Nov 2020, 19:15 UTC

CVE-2020-3531
Vulnerability Scoring

9.8
/10

Attack Complexity Details

  • Attack Complexity: Low Impact
  • Attack Vector: NETWORK
  • Privileges Required: None
  • Scope: UNCHANGED
  • User Interaction: NONE

CIA Impact Definition

  • Confidentiality: HIGH IMPACT
  • Integrity: HIGH IMPACT
  • Availability: HIGH IMPACT

CVE-2020-3531 Vulnerability Summary

A vulnerability in the REST API of Cisco IoT Field Network Director (FND) could allow an unauthenticated, remote attacker to access the back-end database of an affected system. The vulnerability exists because the affected software does not properly authenticate REST API calls. An attacker could exploit this vulnerability by obtaining a cross-site request forgery (CSRF) token and then using the token with REST API requests. A successful exploit could allow the attacker to access the back-end database of the affected device and read, alter, or drop information.

Access Complexity Graph

Above is the Access Complexity Graph for CVE-2020-3531. It helps visualize the difficulty level and privilege requirements needed to exploit this vulnerability, providing a quick assessment of its exploitation feasibility.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2020-3531, 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.

Impact Analysis

Below is the Impact Analysis for CVE-2020-3531, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.49% (probability of exploit)

EPSS Percentile: 76.23% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 23.769999999999996% of others.

CVE-2020-3531 Detailed Information and External References

References

CWE

CWE-306

CAPEC

  • Choosing Message Identifier CAPEC-12 This pattern of attack is defined by the selection of messages distributed via multicast or public information channels that are intended for another client by determining the parameter value assigned to that client. This attack allows the adversary to gain access to potentially privileged information, and to possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could be used to change the adversary's identifier to more a privileged one.
  • Force the System to Reset Values CAPEC-166 An attacker forces the target into a previous state in order to leverage potential weaknesses in the target dependent upon a prior configuration or state-dependent factors. Even in cases where an attacker may not be able to directly control the configuration of the targeted application, they may be able to reset the configuration to a prior state since many applications implement reset functions.
  • Communication Channel Manipulation CAPEC-216 An adversary manipulates a setting or parameter on communications channel in order to compromise its security. This can result in information exposure, insertion/removal of information from the communications stream, and/or potentially system compromise.
  • Using Unpublished Interfaces or Functionality CAPEC-36 An adversary searches for and invokes interfaces or functionality that the target system designers did not intend to be publicly available. If interfaces fail to authenticate requests, the attacker may be able to invoke functionality they are not authorized for.
  • Cross Site Request Forgery CAPEC-62 An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.

Vulnerable Configurations

  • cpe:2.3:a:cisco:iot_field_network_director:-:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:-:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:3.2.0-182:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:3.2.0-182:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.2\(0.4\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.2\(0.4\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.2\(1.2\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.2\(1.2\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.3\(0.20\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.3\(0.20\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4\(0.26\):*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4\(0.26\):*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4.2-11:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4.2-11:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cisco:iot_field_network_director:4.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:cisco:iot_field_network_director:4.6.0:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

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