CVE-2020-3426 Vulnerability Analysis & Exploit Details

CVE-2020-3426
Vulnerability Scoring

9.1
/10
Critical Risk

As a catastrophic security flaw, CVE-2020-3426 has severe implications, demanding immediate intervention.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or 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-2020-3426 Details

Status: Modified

Last updated: 🕒 07 Nov 2023, 03:22 UTC
Originally published on: 🕕 24 Sep 2020, 18:15 UTC

Time between publication and last update: 1138 days

CVSS Release: version 3

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:N/A:H

CVE-2020-3426 Vulnerability Summary

CVE-2020-3426: A vulnerability in the implementation of the Low Power, Wide Area (LPWA) subsystem of Cisco IOS Software for Cisco 800 Series Industrial Integrated Services Routers (Industrial ISRs) and Cisco 1000 Series Connected Grid Routers (CGR1000) could allow an unauthenticated, remote attacker to gain unauthorized read access to sensitive data or cause a denial of service (DoS) condition. The vulnerability is due to a lack of input and validation checking mechanisms for virtual-LPWA (VLPWA) protocol modem messages. An attacker could exploit this vulnerability by supplying crafted packets to an affected device. A successful exploit could allow the attacker to gain unauthorized read access to sensitive data or cause the VLPWA interface of the affected device to shut down, resulting in DoS condition.

Assessing the Risk of CVE-2020-3426

Access Complexity Graph

The exploitability of CVE-2020-3426 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-2020-3426

With low attack complexity and no required privileges, CVE-2020-3426 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

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-2020-3426, 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-2020-3426, 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-2020-3426 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2020-3426 poses no threat to data integrity.
  • Availability: High
    CVE-2020-3426 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: 0.392% (probability of exploit)

EPSS Percentile: 73.59% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 26.409999999999997% of others.

CVE-2020-3426 References

External References

CWE Common Weakness Enumeration

CWE-264

Vulnerable Configurations

  • cpe:2.3:o:cisco:ios:-:*:*:*:*:*:*:*
    cpe:2.3:o:cisco:ios:-:*:*:*:*:*:*:*
  • cpe:2.3:h:cisco:1120_connected_grid_router:-:*:*:*:*:*:*:*
    cpe:2.3:h:cisco:1120_connected_grid_router:-:*:*:*:*:*:*:*
  • cpe:2.3:h:cisco:1240_connected_grid_router:-:*:*:*:*:*:*:*
    cpe:2.3:h:cisco:1240_connected_grid_router:-:*:*:*:*:*:*:*
  • cpe:2.3:h:cisco:807_industrial_integrated_services_router:-:*:*:*:*:*:*:*
    cpe:2.3:h:cisco:807_industrial_integrated_services_router:-:*:*:*:*:*:*:*
  • cpe:2.3:h:cisco:809_industrial_integrated_services_router:-:*:*:*:*:*:*:*
    cpe:2.3:h:cisco:809_industrial_integrated_services_router:-:*:*:*:*:*:*:*
  • cpe:2.3:h:cisco:829_industrial_integrated_services_router:-:*:*:*:*:*:*:*
    cpe:2.3:h:cisco:829_industrial_integrated_services_router:-:*:*:*:*:*:*:*

Protect Your Infrastructure against CVE-2020-3426: Combat Critical CVE Threats

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