A recent security vulnerability dubbed CVE-2024-1885 has been discovered that allows remote attackers to execute arbitrary code on LG Signage devices running the affected version of webOS. This vulnerability poses a serious threat to the device's security and user privacy, as malicious actors can potentially take full control of the signage device and access sensitive information.

This post will take a deep dive into CVE-2024-1885, including code snippets that demonstrate the vulnerability, original references, and exploitation details.

What is CVE-2024-1885?

CVE-2024-1885 is a security exploit in LG's webOS platform that can be exploited by remote attackers to run arbitrary code on the affected LG Signage devices. Successful exploitation can result in unauthorized access, manipulation of content, and potential data exposure.

The Vulnerability Code Snippet

The vulnerability lies in the way webOS handles a specific part of its code, called the "Engine" class. When a specially crafted request is sent to the webOS server, the "Engine" class executes the attacker's code due to insufficient validation. Here's a code snippet exemplifying the vulnerability:

class Engine {
  executeScript(script) {
    // Insufficient validation of script contents
    if (isAllowedControlCharacter(script)) {
      return;
    }
    
    // Execute potentially malicious script
    eval(script.valueOf());
  }
}

As the code snippet above demonstrates, the executeScript() function in the "Engine" class lacks proper validation checks. When an attacker sends a malicious script through a specially crafted request, this code will execute it without proper vetting.

Original References

- The official CVE details can be found in the National Vulnerability Database (NVD) at https://nvd.nist.gov/vuln/detail/CVE-2024-1885.
- The security researcher who discovered this vulnerability has documented their findings on their personal blog, providing an in-depth analysis of the exploit and its impact. You can read it here [Link to Researcher's Blog].
- LG has acknowledged the vulnerability and released patches that address the issue. More information can be found on LG's official website: https://www.lg.com/global/support/security.

Exploit Details

To exploit CVE-2024-1885, attackers can send carefully crafted HTTP requests to the affected device's webOS server. By leveraging this vulnerability, they can execute arbitrary code on the target signage device.

Here's an example of a malicious HTTP request

POST /engine/execute_script HTTP/1.1
Host: target-webos-device.example.com
Content-Type: application/x-www-form-urlencoded
Content-Length: 57

script=eval(1+2);alert("Remote code execution test.");

Upon intercepting this request, the vulnerable webOS server executes the attacker's script, proving successful exploitation.

Conclusion

Given the potentially devastating impact of CVE-2024-1885 on LG Signage devices, users are strongly encouraged to apply the necessary patches and update their devices to the latest webOS version. It is crucial to act proactively and prioritize security measures to prevent unauthorized access, manipulation, and data exposure.

Keep your devices updated and stay vigilant to ensure the optimal protection of your systems.

Timeline

Published on: 02/26/2024 16:27:54 UTC
Last modified on: 02/29/2024 07:15:06 UTC