CVE-2020-8920 Vulnerability Analysis & Exploit Details

CVE-2020-8920
Vulnerability Scoring

3.5
/10
Moderate Risk

Exploiting CVE-2020-8920 requires specific conditions, leading to a moderate security impact.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Adjacent_network
    Attack Vector Under Analysis
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2020-8920 Details

Status: Modified

Last updated: 🕠 21 Nov 2024, 05:39 UTC
Originally published on: 🕚 10 Dec 2020, 11:15 UTC

Time between publication and last update: 1441 days

CVSS Release: version 3

CVSS3 Source

cve-coordination@google.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2020-8920 Vulnerability Summary

CVE-2020-8920: An information leak vulnerability exists in Gerrit versions prior to 2.14.22, 2.15.21, 2.16.25, 3.0.15, 3.1.10, 3.2.5 where an overoptimization with the FilteredRepository wrapper skips the verification of access on All-Users repositories, allowing an attacker to get read access to all users' personal information associated with their accounts.

Assessing the Risk of CVE-2020-8920

Access Complexity Graph

The exploitability of CVE-2020-8920 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-2020-8920

CVE-2020-8920 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation 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-2020-8920, 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-2020-8920, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2020-8920 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: None
    CVE-2020-8920 poses no threat to data integrity.
  • Availability: None
    CVE-2020-8920 does not impact system availability.

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.048% (probability of exploit)

EPSS Percentile: 20.53% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 79.47% of others.

CVE-2020-8920 References

External References

CWE Common Weakness Enumeration

NVD-CWE-Other

Vulnerable Configurations

  • cpe:2.3:a:google:gerrit:2.14.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.2:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.2:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.3:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.3:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.4:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.4:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.6:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.6:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.7:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.7:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.8:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.8:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.9:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.9:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.10:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.10:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.11:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.11:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.12:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.12:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.13:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.13:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.14:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.14:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.15:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.15:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.16:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.16:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.17:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.17:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.18:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.18:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.19:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.19:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.20:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.20:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.14.21:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.14.21:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.2:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.2:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.3:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.3:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.4:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.4:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.5:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.5:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.6:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.6:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.7:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.7:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.8:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.8:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.9:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.9:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.10:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.10:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.11:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.11:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.12:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.12:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.13:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.13:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.14:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.14:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.15:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.15:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.16:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.16:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.17:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.17:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.18:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.18:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.19:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.19:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.15.20:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.15.20:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.2:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.2:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.3:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.3:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.4:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.4:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.5:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.5:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.6:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.7:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.7:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.8:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.8:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.9:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.9:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.10:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.10:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.12:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.12:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.13:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.13:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.14:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.14:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.15:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.15:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.16:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.16:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.17:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.17:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.18:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.18:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.19:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.19:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.20:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.20:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.21:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.21:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.22:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.23:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.23:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:2.16.24:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:2.16.24:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.5:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.6:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.6:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.7:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.7:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.8:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.8:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.9:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.9:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.10:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.10:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.11:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.11:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.12:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.12:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.13:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.13:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.0.14:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.0.14:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.5:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.6:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.6:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.7:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.7:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.8:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.8:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.1.9:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.1.9:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:google:gerrit:3.2.4:*:*:*:*:*:*:*
    cpe:2.3:a:google:gerrit:3.2.4:*:*:*:*:*:*:*

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