CVE-2024-35368

Comprehensive Technical Analysis of CVE-2024-35368

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-35368 Description: FFmpeg n7.0 is affected by a Double Free vulnerability via the rkmpp_retrieve_frame function within libavcodec/rkmppdec.c. CVSS Score: 9.8

Severity Evaluation: The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for remote code execution (RCE) and the ease of exploitation. Double Free vulnerabilities can lead to memory corruption, which attackers can leverage to execute arbitrary code or cause denial-of-service (DoS) conditions.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker could craft a malicious media file that, when processed by FFmpeg, triggers the Double Free condition.
• Local Exploitation: A local user with access to the system could exploit the vulnerability to escalate privileges or disrupt services.

Exploitation Methods:

• Memory Corruption: By manipulating the memory allocation and deallocation process, an attacker can cause the program to free the same memory region twice, leading to undefined behavior.
• Arbitrary Code Execution: Exploiting the Double Free condition can allow an attacker to execute arbitrary code, potentially leading to full system compromise.

3. Affected Systems and Software Versions

Affected Software:

• FFmpeg version n7.0

Affected Systems:

• Any system running FFmpeg n7.0, including but not limited to:
  • Media servers and streaming services
  • Video processing and transcoding systems
  • Multimedia applications that rely on FFmpeg for media handling

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the patch provided in the FFmpeg GitHub repository (commit 4513300989502090c4fd6560544dce399a8cd53c).
• Upgrade: Upgrade to a newer version of FFmpeg that includes the fix for this vulnerability.

Long-Term Mitigations:

• Input Validation: Implement strict input validation for media files to prevent malicious files from being processed.
• Memory Management: Enhance memory management practices to detect and prevent Double Free conditions.
• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Exploitation Risk: The high CVSS score and the nature of the vulnerability make it a prime target for exploitation by threat actors.
• Service Disruption: Media processing services relying on FFmpeg n7.0 are at risk of disruption and potential data breaches.

Long-Term Impact:

• Increased Awareness: This vulnerability highlights the importance of robust memory management and input validation in multimedia processing software.
• Enhanced Security Practices: The incident may prompt developers to adopt more rigorous security practices and tools to detect and mitigate similar vulnerabilities in the future.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: rkmpp_retrieve_frame within libavcodec/rkmppdec.c
• Issue: The function incorrectly frees the same memory region twice, leading to a Double Free condition.

Code Analysis:

• Source Code Reference: The vulnerability is located at line 466 of libavcodec/rkmppdec.c in FFmpeg n7.0.
• Patch Reference: The fix is available in the FFmpeg GitHub repository (commit 4513300989502090c4fd6560544dce399a8cd53c).

Exploitation Steps:

1. Craft Malicious Input: Create a media file designed to trigger the Double Free condition.
2. Process File: Feed the malicious file to FFmpeg n7.0 for processing.
3. Exploit Memory Corruption: Leverage the memory corruption to execute arbitrary code or cause a DoS condition.

Detection and Monitoring:

• Log Analysis: Monitor system logs for unusual memory allocation and deallocation patterns.
• Intrusion Detection: Implement intrusion detection systems (IDS) to detect and alert on suspicious activities related to media file processing.

Conclusion: CVE-2024-35368 is a critical vulnerability in FFmpeg n7.0 that requires immediate attention. Organizations should prioritize patching and upgrading affected systems to mitigate the risk of exploitation. Enhanced security practices and regular audits are essential to prevent similar vulnerabilities in the future.