CVE-2020-1976 Vulnerability Analysis & Exploit Details

CVE-2020-1976
Vulnerability Scoring

5.5
/10
Significant Risk

Security assessments indicate that CVE-2020-1976 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • 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-2020-1976 Details

Status: Analyzed

Last updated: 🕑 04 May 2020, 14:14 UTC
Originally published on: 🕚 12 Feb 2020, 23:15 UTC

Time between publication and last update: 81 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-1976 Vulnerability Summary

CVE-2020-1976: A denial-of-service (DoS) vulnerability in Palo Alto Networks GlobalProtect software running on Mac OS allows authenticated local users to cause the Mac OS kernel to hang or crash. This issue affects GlobalProtect 5.0.5 and earlier versions of GlobalProtect 5.0 on Mac OS.

Assessing the Risk of CVE-2020-1976

Access Complexity Graph

The exploitability of CVE-2020-1976 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-2020-1976

CVE-2020-1976 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-2020-1976, 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-2020-1976, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2020-1976 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2020-1976 poses no threat to data integrity.
  • Availability: High
    CVE-2020-1976 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: 0.042% (probability of exploit)

EPSS Percentile: 5.02% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 94.98% of others.

CVE-2020-1976 References

External References

CWE Common Weakness Enumeration

CWE-642

CAPEC Common Attack Pattern Enumeration and Classification

  • Exploitation of Trusted Identifiers CAPEC-21 An adversary guesses, obtains, or "rides" a trusted identifier (e.g. session ID, resource ID, cookie, etc.) to perform authorized actions under the guise of an authenticated user or service.
  • Accessing/Intercepting/Modifying HTTP Cookies CAPEC-31 This attack relies on the use of HTTP Cookies to store credentials, state information and other critical data on client systems. There are several different forms of this attack. The first form of this attack involves accessing HTTP Cookies to mine for potentially sensitive data contained therein. The second form involves intercepting this data as it is transmitted from client to server. This intercepted information is then used by the adversary to impersonate the remote user/session. The third form is when the cookie's content is modified by the adversary before it is sent back to the server. Here the adversary seeks to convince the target server to operate on this falsified information.

Vulnerable Configurations

  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:-:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:-:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:linux:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:linux:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:macos:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:macos:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:universal_windows_platform:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0:*:*:*:*:universal_windows_platform:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.0:*:*:*:*:windows:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.0:*:*:*:*:windows:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.0:*:*:*:*:macos:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.0:*:*:*:*:macos:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.3:*:*:*:*:windows:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.3:*:*:*:*:windows:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.4:*:*:*:*:linux:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.4:*:*:*:*:linux:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.4:*:*:*:*:macos:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.4:*:*:*:*:macos:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.5:*:*:*:*:windows:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.5:*:*:*:*:windows:*:*
  • cpe:2.3:a:paloaltonetworks:globalprotect:5.0.5:*:*:*:*:macos:*:*
    cpe:2.3:a:paloaltonetworks:globalprotect:5.0.5:*:*:*:*:macos:*:*

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