CVE-2021-30629:Use after free vulnerability in Google Chrome's Permissions component (CVE-2021-30629)

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CVE-2021-30629 is a use-after-free vulnerability (CWE-416) discovered in the Permissions component of Google Chrome. This vulnerability affects versions prior to 93.0.4577.82. When exploited, it allows a remote attacker who has already compromised the renderer process to potentially leverage heap corruption via a specially crafted HTML page. This could lead to arbitrary code execution within the browser context, potentially compromising the affected system.

Overview

This vulnerability exists in the Permissions component of Google Chrome and is classified as a use-after-free vulnerability (CWE-416). Use-after-free vulnerabilities occur when a program continues to use a pointer after it has been freed, which can lead to memory corruption and potentially code execution. In this case, the vulnerability could be exploited by an attacker who has already compromised the Chrome renderer process. The attacker could craft a malicious HTML page that triggers the vulnerability, leading to heap corruption and potentially gaining elevated privileges or executing arbitrary code within the browser context. This vulnerability was addressed in Chrome version 93.0.4577.82.

Remediation

Users should update to Google Chrome version 93.0.4577.82 or later to mitigate this vulnerability. The update can be installed through Chrome's built-in update mechanism or by downloading the latest version from the official Google Chrome website. Organizations should ensure that all Chrome installations are updated promptly to prevent potential exploitation. Additionally, system administrators should consider implementing defense-in-depth strategies such as network segmentation and least privilege access controls to minimize the impact of browser-based attacks.

For Fedora users, updates are available through the standard package management system as indicated in the referenced Fedora security advisories (FEDORA-2021-ab09a05562 and FEDORA-2021-591b3a2af0).

References

  1. Google Chrome Release Blog: https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html
  2. Chrome Bug Tracker: https://crbug.com/1243646 (Note: May require permissions to access)
  3. Fedora Security Advisory: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ (FEDORA-2021-ab09a05562)
  4. Fedora Security Advisory: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ (FEDORA-2021-591b3a2af0)
  5. MITRE CWE-416: https://cwe.mitre.org/data/definitions/416.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. Health Care & Social Assistance
    Health Care & Social Assistance
  2. Manufacturing
    Manufacturing
  3. Public Administration
    Public Administration
  4. Educational Services
    Educational Services
  5. Transportation & Warehousing
    Transportation & Warehousing
  6. Finance and Insurance
    Finance and Insurance
  7. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  8. Retail Trade
    Retail Trade
  9. Other Services (except Public Administration)
    Other Services (except Public Administration)
  10. Utilities
    Utilities
  11. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  12. Information
    Information
  13. Management of Companies & Enterprises
    Management of Companies & Enterprises
  14. Construction
    Construction
  15. Mining
    Mining
  16. Accommodation & Food Services
    Accommodation & Food Services
  17. Agriculture, Forestry Fishing & Hunting
    Agriculture, Forestry Fishing & Hunting
  18. Real Estate Rental & Leasing
    Real Estate Rental & Leasing
  19. Wholesale Trade
    Wholesale Trade
  20. Administrative, Support, Waste Management & Remediation Services
    Administrative, Support, Waste Management & Remediation Services

Focus on What Matters

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

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