CVE-2023-24720
CVE-2023-24720
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- None
- User Interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Description
An arbitrary file upload vulnerability in readium-js v0.32.0 allows attackers to execute arbitrary code via uploading a crafted EPUB file.
Comprehensive Technical Analysis of CVE-2023-24720
1. Vulnerability Assessment and Severity Evaluation
CVE ID: CVE-2023-24720 Description: An arbitrary file upload vulnerability in readium-js v0.32.0 allows attackers to execute arbitrary code via uploading a crafted EPUB file. CVSS Score: 9.8
The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for complete system compromise, including the execution of arbitrary code, which can lead to significant data breaches, system downtime, and loss of integrity.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- File Upload: The primary attack vector is the upload functionality in readium-js, which processes EPUB files. An attacker can craft a malicious EPUB file designed to exploit the vulnerability.
- Phishing: Attackers may use phishing techniques to trick users into uploading the crafted EPUB file.
Exploitation Methods:
- Code Execution: The crafted EPUB file can contain malicious code that, when processed by readium-js, executes arbitrary commands on the server.
- Cross-Site Scripting (XSS): As indicated in the references, the vulnerability may also allow for XSS attacks, which can be used to steal session cookies, perform actions on behalf of the user, or redirect users to malicious sites.
3. Affected Systems and Software Versions
Affected Software:
- readium-js v0.32.0: This specific version is known to be vulnerable.
Affected Systems:
- Any system running readium-js v0.32.0, including cloud-based e-reader platforms and local installations.
4. Recommended Mitigation Strategies
Immediate Actions:
- Update Software: Upgrade to a patched version of readium-js if available. If no patch is available, consider temporarily disabling the file upload functionality until a fix is released.
- Input Validation: Implement strict input validation and sanitization for uploaded files to prevent the execution of malicious code.
- Content Security Policy (CSP): Enforce a strong CSP to mitigate XSS attacks.
Long-Term Strategies:
- Regular Security Audits: Conduct regular security audits and code reviews to identify and fix vulnerabilities.
- User Education: Educate users about the risks of uploading files from untrusted sources and the importance of verifying file integrity.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activities and potential exploitation attempts.
5. Impact on Cybersecurity Landscape
The discovery of CVE-2023-24720 highlights the ongoing challenge of securing file upload functionalities, which are common in many web applications. This vulnerability underscores the need for robust input validation, secure coding practices, and continuous monitoring. The high CVSS score indicates the potential for severe impacts, including data breaches, financial loss, and reputational damage.
6. Technical Details for Security Professionals
Technical Overview:
- Vulnerability Type: Arbitrary file upload leading to remote code execution (RCE).
- Exploit Mechanism: The vulnerability is triggered when a crafted EPUB file is uploaded and processed by readium-js. The malicious code within the EPUB file is executed on the server.
- Detection: Security professionals can detect exploitation attempts by monitoring for unusual file upload activities, unexpected system behavior, and unauthorized code execution.
- Mitigation: Implementing a secure file upload mechanism that includes file type verification, content scanning, and sandboxing can help mitigate the risk. Additionally, ensuring that the server runs with the least privilege necessary can limit the impact of a successful exploit.
References:
Conclusion
CVE-2023-24720 represents a critical vulnerability in readium-js v0.32.0 that can be exploited to execute arbitrary code via a crafted EPUB file. The high CVSS score underscores the urgency of addressing this issue through immediate mitigation strategies and long-term security enhancements. Organizations should prioritize updating affected systems and implementing robust security measures to protect against similar vulnerabilities in the future.