CVE-2021-45345:Buffer Overflow in En3rgy WebcamServer v.0.5.2 allows remote attackers to cause denial of service.

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A buffer overflow vulnerability exists in En3rgy WebcamServer version 0.5.2. The vulnerability is present in the WebcamServer.exe file and can be exploited by remote attackers to cause a denial of service condition. This vulnerability is classified as CWE-120 (Classic Buffer Overflow) which occurs when software writes data past the end of an allocated buffer, potentially allowing an attacker to execute arbitrary code or crash the application.

Overview

En3rgy WebcamServer is an open-source application that allows users to stream webcam video over a network. The vulnerability in version 0.5.2 stems from improper input validation in the WebcamServer.exe file. When processing certain network requests, the application fails to properly check input boundaries, resulting in a buffer overflow condition. An attacker can exploit this vulnerability by sending specially crafted requests to the server, causing the application to crash and resulting in a denial of service. This vulnerability is particularly concerning as WebcamServer is often exposed directly to networks, making it an accessible target for remote attackers.

Remediation

To mitigate this vulnerability, users should consider the following actions:

  1. Update to a newer version of WebcamServer if available that addresses this vulnerability.
  2. If updates are not available, consider implementing network-level protections such as firewalls to restrict access to the WebcamServer application.
  3. Place the WebcamServer behind a reverse proxy that can filter malicious requests.
  4. Consider alternative webcam server solutions that are actively maintained and regularly updated.
  5. Monitor system logs for unusual activity that might indicate exploitation attempts.
  6. Implement proper network segmentation to limit the exposure of the WebcamServer application.

References

  1. Technical analysis and vulnerability details: https://gist.github.com/0xHop/0d065694d56ac3943d8e8c239d80c63f
  2. Additional vulnerability information: https://gist.github.com/0xHop/337e65ec684b8866e86f4b25b8f1dbc7
  3. WebcamServer project page: https://sourceforge.net/projects/webcamserv/
  4. CWE-120 (Classic Buffer Overflow): https://cwe.mitre.org/data/definitions/120.html

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

Focus on What Matters

  1. See Everything.
  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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