Description
Deserialization of Untrusted Data vulnerability in Drupal Core allows Object Injection.This issue affects Drupal Core: from 8.0.0 before 10.2.11, from 10.3.0 before 10.3.9, from 11.0.0 before 11.0.8. Drupal core contains a chain of methods that is exploitable when an insecure deserialization vulnerability exists on the site. This so called gadget chain presents no direct threat, but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2024-3453
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2024-3453 pertains to a deserialization of untrusted data issue in Drupal Core, which can lead to Object Injection. This vulnerability is particularly severe due to its potential to facilitate remote code execution (RCE) if exploited in conjunction with other vulnerabilities. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The scoring vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H highlights the following characteristics:
- Attack Vector (AV:N): Network exploitable.
- Attack Complexity (AC:L): Low complexity required for exploitation.
- Privileges Required (PR:N): No privileges are required.
- User Interaction (UI:N): No user interaction is required.
- Scope (S:U): Unchanged.
- Confidentiality (C:H): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves the deserialization of untrusted data, which can be manipulated to inject malicious objects. This vulnerability can be exploited through:
- Untrusted Input: An attacker can send specially crafted data to the application, which is then deserialized without proper validation.
- Gadget Chains: The presence of a gadget chain in Drupal Core allows the attacker to chain multiple methods together, leading to RCE.
- Combination with Other Vulnerabilities: This vulnerability can be combined with other flaws to escalate privileges or execute arbitrary code.
3. Affected Systems and Software Versions
The vulnerability affects the following versions of Drupal Core:
- Drupal Core 8.0.0 before 10.2.11
- Drupal Core 10.3.0 before 10.3.9
- Drupal Core 11.0.0 before 11.0.8
Organizations using these versions are at risk and should prioritize updating to the patched versions.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following steps are recommended:
- Update to Patched Versions: Immediately update to the latest patched versions of Drupal Core (10.2.11, 10.3.9, or 11.0.8 and above).
- Input Validation: Implement strict input validation and sanitization to ensure that only trusted data is deserialized.
- Disable Unnecessary Features: Disable any unnecessary features or modules that may introduce additional attack vectors.
- Monitoring and Logging: Enhance monitoring and logging to detect any suspicious activities related to deserialization processes.
- Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
5. Impact on European Cybersecurity Landscape
The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of Drupal in various sectors, including government, education, and private enterprises. The potential for RCE can lead to data breaches, service disruptions, and financial losses. Organizations must prioritize patching and implementing robust security measures to protect against such threats.
6. Technical Details for Security Professionals
For security professionals, the following technical details are crucial:
- Deserialization Process: Understand the deserialization process in Drupal Core and identify points where untrusted data is handled.
- Gadget Chain Analysis: Analyze the gadget chain in Drupal Core to understand how methods can be chained together to achieve RCE.
- Patch Review: Review the patch commit (
17f362b988e6ad6bd5cc1e7e8a7a0804e1536fbc) to understand the changes made to mitigate the vulnerability. - Security Best Practices: Implement security best practices for handling serialized data, including using secure serialization libraries and avoiding the use of untrusted data in deserialization processes.
Conclusion
EUVD-2024-3453 represents a critical vulnerability in Drupal Core that requires immediate attention. Organizations should prioritize updating to the patched versions and implementing robust security measures to mitigate the risk. The potential for RCE underscores the importance of vigilant cybersecurity practices in protecting against such threats.