EUVD-2023-58562

Comprehensive Technical Analysis of EUVD-2023-58562

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2023-58562 is a command injection flaw in the com.webos.service.connectionmanager/tv/setVlanStaticAddress endpoint of webOS versions 5 and 6. This vulnerability allows an attacker to execute arbitrary commands as the dbus user through specially crafted requests. The severity of this vulnerability is rated with a CVSS base score of 9.1, indicating a critical risk.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability can be exploited remotely over the network.
• AC:L (Low Complexity): The attack requires low skill or resources to exploit.
• PR:H (High Privileges Required): The attacker needs to be authenticated.
• UI:N (No User Interaction): No user interaction is required to exploit the vulnerability.
• S:C (Changed Scope): The vulnerability can affect resources beyond the security scope managed by the security authority.
• C:H (High Confidentiality Impact): There is a high impact on the confidentiality of the system.
• I:H (High Integrity Impact): There is a high impact on the integrity of the system.
• A:H (High Availability Impact): There is a high impact on the availability of the system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated Remote Attack: An attacker with valid credentials can send crafted requests to the vulnerable endpoint, leading to command execution.
• Phishing and Credential Theft: Attackers may use phishing techniques to steal credentials and then exploit the vulnerability.

Exploitation Methods:

• Command Injection: By sending specially crafted requests to the setVlanStaticAddress endpoint, an attacker can inject malicious commands that will be executed by the dbus user.
• Privilege Escalation: Once the attacker gains command execution capabilities, they can escalate privileges to gain further control over the system.

3. Affected Systems and Software Versions

The vulnerability affects the following webOS versions and TV models:

• webOS 5.5.0 - 04.50.51 running on OLED55CXPUA
• webOS 6.3.3-442 (kisscurl-kinglake) - 03.36.50 running on OLED48C1PUB

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Patching: Apply the latest security patches provided by LG for the affected webOS versions.
• Access Control: Restrict access to the setVlanStaticAddress endpoint to trusted users only.
• Network Segmentation: Isolate affected devices from critical networks to limit the potential impact.

Long-Term Mitigation:

• Regular Updates: Ensure that all devices are regularly updated with the latest security patches.
• Monitoring: Implement continuous monitoring to detect and respond to suspicious activities.
• User Education: Educate users about the risks of phishing and the importance of strong, unique passwords.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to European consumers and organizations using affected LG TV models. Given the widespread use of smart TVs, this vulnerability could be exploited to compromise personal data, conduct surveillance, or launch further attacks within a network. The high CVSS score underscores the need for immediate attention and mitigation efforts to protect against potential large-scale breaches.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: com.webos.service.connectionmanager/tv/setVlanStaticAddress
• Affected User: dbus
• Exploitation Requirements: Authenticated access

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the setVlanStaticAddress endpoint.
• Intrusion Detection Systems (IDS): Implement IDS rules to detect and alert on suspicious requests to the vulnerable endpoint.
• Incident Response: Develop an incident response plan that includes steps for isolating affected devices, containing the threat, and restoring normal operations.

References:

• Bitdefender Blog
• LG Security Bulletin

Aliases:

• CVE-2023-6320
• GSD-2023-6320

Assigner:

• Bitdefender

EPSS Score:

• 3 (Exploit Prediction Scoring System)

ENISA IDs:

• Product:
  • ID: 1bc2cbd0-cd2f-33de-ae76-05bdcaa177b8
  • Name: WebOS
  • Version: 5.5.0
  • ID: 6270a204-70a8-35df-bef0-f99238a2a27d
  • Name: WebOS
  • Version: 6.3.3-442
• Vendor:
  • ID: df0fc793-6ae6-34d9-b176-bd37eccb1de0
  • Name: LG

This comprehensive analysis provides a clear understanding of the vulnerability, its potential impact, and the necessary steps to mitigate the risk effectively.