CVE-2020-23887:Heap overflow vulnerability in XnView MP v0.96.4 allows attackers to cause a denial of service via crafted ICO files.

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XnView MP version 0.96.4 contains a critical heap overflow vulnerability that can be exploited by processing specially crafted ICO image files. When the application attempts to process these malicious files, it triggers a read access violation in the USER32!SmartStretchDIBits function, which can lead to application crashes. This vulnerability allows remote attackers to cause denial of service conditions, potentially disrupting normal operations for users of the affected software.

Overview

XnView MP is a popular image viewer, browser, and converter software used by many to manage their photo collections. The vulnerability (CVE-2020-23887) exists in version 0.96.4 of the software and is classified as a CWE-787 (Out-of-bounds Write) issue. The heap overflow occurs when processing specially crafted ICO files, causing memory corruption that leads to application crashes. The vulnerability specifically manifests as a read access violation starting at USER32!SmartStretchDIBits+0x33, indicating problems in the image stretching functionality when handling certain ICO file formats. This vulnerability poses a significant risk to users who frequently open image files from untrusted sources.

Remediation

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

  1. Update XnView MP to the latest version available from the official website (https://www.xnview.com/en/xnviewmp/).
  2. Avoid opening ICO files from untrusted sources until the update is applied.
  3. Consider using alternative image viewing applications temporarily if updates are not immediately available.
  4. Implement proper input validation if developing applications that interact with XnView MP.
  5. Configure security software to scan image files before opening them with XnView MP.

References

  1. Vulnerability details and proof of concept: https://github.com/Aurorainfinity/vulnerabilities/tree/master/xnviewmp
  2. Official XnView MP product page: https://www.xnview.com/en/xnviewmp/
  3. CWE-787 (Out-of-bounds Write): https://cwe.mitre.org/data/definitions/787.html
  4. MITRE CVE Entry: CVE-2020-23887

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

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