Critical Alert: CISA Flags High-Risk CVE-2023-4762 in Chromium V8 as Actively Exploited Vulnerability

Bar Refael

February 7, 2024

CISA has officially updated its Known Exploited Vulnerabilities Catalog to include a newly identified vulnerability, CVE-2023-4762, following confirmed instances of active exploitation. This addition underscores the continuous threat posed by certain vulnerabilities within the cyber landscape, especially those that have been weaponized by malicious actors against various targets, including federal entities.

Vulnerability Details

  • CVE ID: CVE-2023-4762
  • Affected Software: Google Chromium V8 Engine
  • Vulnerability Type: Type Confusion Vulnerability
  • Impact: Allows remote attackers to execute arbitrary code
  • Attack Vector: Through a specially crafted HTML page
  • Chromium Security Severity: High
  • Software Version Affected: Prior to Google Chrome 116.0.5845.179
  • Remediation Status: Users are advised to update to the latest version of the software to mitigate this vulnerability.

Severity Assessment

The National Vulnerability Database (NVD) has provided a preliminary CVSS score reflecting the critical nature of this vulnerability:

  • Base Score: 8.8 HIGH
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

This score indicates a high severity level, emphasizing the ease of exploitation (low complexity), the lack of required privileges, the necessity for user interaction, and the high impact on confidentiality, integrity, and availability.

Policy Context

CVE-2023-4762’s addition to the catalog aligns with Binding Operational Directive (BOD) 22-01, aimed at reducing the federal enterprise’s exposure to cyber threats by mandating the remediation of known exploited vulnerabilities. While BOD 22-01 specifically targets Federal Civilian Executive Branch (FCEB) agencies, CISA strongly advises all organizations to adhere to these guidelines as part of their cybersecurity hygiene to protect against prevalent cyber threats.

Recommendations

  • Immediate Patching: Organizations running vulnerable versions of the Google Chromium V8 engine should immediately upgrade to the latest, non-vulnerable version.
  • Vulnerability Management: Incorporate CVE-2023-4762 into your vulnerability management program, prioritizing its remediation in line with CISA’s guidance.
  • Monitoring and Detection: Enhance monitoring capabilities to detect exploitation attempts and indicators of compromise associated with CVE-2023-4762.
  • Awareness and Training: Educate staff about the risks associated with type confusion vulnerabilities and the importance of adhering to security best practices.

The identification and prompt inclusion of CVE-2023-4762 into CISA’s Known Exploited Vulnerabilities Catalog highlight the ongoing and dynamic nature of cyber threats. Organizations are urged to take immediate action in addressing this vulnerability to mitigate potential risks and safeguard their cyber infrastructure against exploitation.

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Stay safe and informed,

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