CVE-2020-22024:Buffer Overflow in FFmpeg 4.2's lagfun_frame16 Function

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A buffer overflow vulnerability exists in FFmpeg 4.2 within the lagfun_frame16 function located in libavfilter/vf_lagfun.c. This vulnerability could allow a remote attacker to cause a denial of service condition by providing specially crafted input. The issue is classified as CWE-120 (Buffer Copy without Checking Size of Input).

Overview

FFmpeg is a popular multimedia framework used to decode, encode, transcode, mux, demux, stream, filter, and play various audio and video formats. The vulnerability affects the lagfun filter component which is used for video filtering effects. When processing 16-bit video frames through the lagfun filter, the lagfun_frame16 function fails to properly validate input boundaries, resulting in a buffer overflow condition. An attacker can exploit this vulnerability by crafting malicious video files that, when processed by FFmpeg, could cause the application to crash, leading to denial of service.

Remediation

Users and administrators should take the following actions to mitigate this vulnerability:

  • Update to a patched version of FFmpeg if available
  • If updating is not immediately possible, consider disabling the lagfun filter when processing untrusted video files
  • Implement input validation before processing video files with FFmpeg
  • Monitor system logs for potential exploitation attempts
  • Consider implementing sandboxing or containerization when processing untrusted media files with FFmpeg

References

  • FFmpeg Issue Tracker: https://trac.ffmpeg.org/ticket/8310
  • CWE-120: Buffer Copy without Checking Size of Input: https://cwe.mitre.org/data/definitions/120.html
  • MITRE CVE Entry: CVE-2020-22024

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Manufacturing
    Manufacturing
  2. Health Care & Social Assistance
    Health Care & Social Assistance
  3. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  4. Finance and Insurance
    Finance and Insurance
  5. Educational Services
    Educational Services
  6. Information
    Information
  7. Management of Companies & Enterprises
    Management of Companies & Enterprises
  8. Public Administration
    Public Administration
  9. Retail Trade
    Retail Trade
  10. Transportation & Warehousing
    Transportation & Warehousing
  11. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  12. Other Services (except Public Administration)
    Other Services (except Public Administration)
  13. Real Estate Rental & Leasing
    Real Estate Rental & Leasing
  14. Utilities
    Utilities
  15. Wholesale Trade
    Wholesale Trade
  16. Accommodation & Food Services
    Accommodation & Food Services
  17. Administrative, Support, Waste Management & Remediation Services
    Administrative, Support, Waste Management & Remediation Services
  18. Agriculture, Forestry Fishing & Hunting
    Agriculture, Forestry Fishing & Hunting
  19. Construction
    Construction
  20. Mining
    Mining

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  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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