CVE-2023-27789:Reachable assertion vulnerability in TCPprep v.4.4.3 allows remote attackers to cause denial of service.

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A vulnerability was discovered in TCPprep version 4.4.3, which is part of the TCPreplay suite. The issue exists in the cidr2cidr function at cidr.c:178, where a reachable assertion (CWE-617) can be triggered by a remote attacker. When exploited, this vulnerability allows attackers to cause a denial of service condition by providing specially crafted input that triggers the assertion, causing the application to terminate unexpectedly.

Overview

TCPreplay is a suite of free open source utilities for editing and replaying previously captured network traffic. TCPprep is a component that allows users to prepare capture files for use with TCPreplay. The vulnerability exists in the CIDR (Classless Inter-Domain Routing) handling functionality of TCPprep. When processing certain CIDR inputs, the application can reach an assertion that was intended for debugging purposes but remains in the production code. When this assertion is triggered, the application terminates abruptly, leading to a denial of service condition. This vulnerability is particularly concerning for environments where TCPprep is used in automated workflows or critical network testing scenarios.

Remediation

Users of TCPprep should upgrade to a patched version that addresses this vulnerability. The issue has been fixed in a pull request (PR #783) to the TCPreplay GitHub repository. If upgrading is not immediately possible, users should implement the following mitigations:

  1. Avoid processing untrusted CIDR inputs with TCPprep
  2. Run TCPprep in an isolated environment where a potential crash would have minimal impact
  3. Implement input validation before passing CIDR data to TCPprep
  4. Monitor for unexpected terminations of TCPprep processes

Fedora users should apply the security updates provided in the Fedora package announcements referenced below.

References

  1. GitHub Issue: https://github.com/appneta/tcpreplay/issues/784 - Details the vulnerability and includes discussion about the fix
  2. GitHub Pull Request: https://github.com/appneta/tcpreplay/pull/783 - Contains the patch that fixes the vulnerability
  3. Fedora Security Advisory: FEDORA-2023-7ffeed7339 - https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R3ER3YTFR3XIDMYEB7LMFWFTPVQALBHC/
  4. Fedora Security Advisory: FEDORA-2023-37bdea9241 - https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UE3J4LKYFNKPKNSLDQK4JG36THQMQH3V/
  5. Fedora Security Advisory: FEDORA-2023-96ffd40fd4 - https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UK2BRH3W3ECF5FDXP6QM3ZEDTHIOE4M5/
  6. CWE-617: Reachable Assertion - https://cwe.mitre.org/data/definitions/617.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. Manufacturing
    Manufacturing
  2. Arts, Entertainment & Recreation
    Arts, Entertainment & Recreation
  3. Finance and Insurance
    Finance and Insurance
  4. Health Care & Social Assistance
    Health Care & Social Assistance
  5. Other Services (except Public Administration)
    Other Services (except Public Administration)
  6. Professional, Scientific, & Technical Services
    Professional, Scientific, & Technical Services
  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. Construction
    Construction
  11. Educational Services
    Educational Services
  12. Information
    Information
  13. Management of Companies & Enterprises
    Management of Companies & Enterprises
  14. Mining
    Mining
  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

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  3. Proactively Mitigate Threats.

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Armis Vulnerability Intelligence Database