Overview
The focus of this blog post is CVE-2024-55063, a severe vulnerability pertaining to multiple code injection points in EasyVirt DC NetScope that allows authenticated remote attackers to execute arbitrary code. This vulnerability affects all versions of EasyVirt DC NetScope up to and including 8.7.0. Given the widespread usage of EasyVirt DC NetScope, this vulnerability could potentially impact a large number of users and systems. It is critical due to its potential to compromise systems and leak sensitive data, emphasizing the need for immediate mitigation.
Vulnerability Summary
CVE ID: CVE-2024-55063
Severity: Critical, CVSS score 8.8
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
EasyVirt DC NetScope | <= 8.7.0 How the Exploit Works
The vulnerability arises from improper input sanitization in several parameters of the EasyVirt DC NetScope. Four parameters-‘lang’, ‘keyboard_layout’, ‘keyboard_variant’, and ‘timezone’-in three different settings pages are susceptible to code injection attacks. An authenticated attacker can insert malicious code into the input fields of these parameters, which the system will then execute. This could potentially lead to a system compromise or data leakage.
Conceptual Example Code
Here’s a conceptual example of how the vulnerability might be exploited using a malicious HTTP request:
POST /international/keyboard/options HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "lang": "<script>malicious_code_here</script>" }In this example, the attacker sends a POST request to the ‘/international/keyboard/options’ endpoint with a malicious script embedded in the ‘lang’ parameter. If the system is vulnerable, it will execute the malicious code, potentially leading to system compromise or data leakage.
Mitigation Guidance
To mitigate this vulnerability, users are advised to apply the vendor-provided patch as soon as possible. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. It’s crucial to keep in mind that WAF/IDS are just temporary solutions and cannot replace the need for patching the system.