CVE-2020-17366 Vulnerability Analysis & Exploit Details

CVE-2020-17366
Vulnerability Scoring

7.4
/10
Very High Risk

Highly exploitable, CVE-2020-17366 poses a critical security risk that could lead to severe breaches.

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: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2020-17366 Details

Status: Analyzed

Last updated: 🕘 27 Jan 2023, 21:01 UTC
Originally published on: 🕙 05 Aug 2020, 22:15 UTC

Time between publication and last update: 904 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-17366 Vulnerability Summary

CVE-2020-17366: An issue was discovered in NLnet Labs Routinator 0.1.0 through 0.7.1. It allows remote attackers to bypass intended access restrictions or to cause a denial of service on dependent routing systems by strategically withholding RPKI Route Origin Authorisation ".roa" files or X509 Certificate Revocation List files from the RPKI relying party's view.

Assessing the Risk of CVE-2020-17366

Access Complexity Graph

The exploitability of CVE-2020-17366 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-2020-17366

CVE-2020-17366 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

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-2020-17366, 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-2020-17366, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2020-17366 has no significant impact on data confidentiality.
  • Integrity: High
    CVE-2020-17366 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2020-17366 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.242% (probability of exploit)

EPSS Percentile: 64.1% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 35.900000000000006% of others.

CVE-2020-17366 References

External References

CWE Common Weakness Enumeration

CWE-295

CAPEC Common Attack Pattern Enumeration and Classification

  • Creating a Rogue Certification Authority Certificate CAPEC-459 An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
  • Signature Spoofing by Improper Validation CAPEC-475 An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

Vulnerable Configurations

  • cpe:2.3:a:nlnetlabs:routinator:0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.6.2:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.6.2:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.6.3:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.6.3:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.6.4:*:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.6.4:*:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.7.0:-:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.7.0:-:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.7.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.7.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.7.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.7.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.7.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:nlnetlabs:routinator:0.7.1:-:*:*:*:*:*:*
    cpe:2.3:a:nlnetlabs:routinator:0.7.1:-:*:*:*:*:*:*

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