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Rewterz Threat Advisory – CVE-2022-20821 – Cisco IOS XR Vulnerability

May 23, 2022

Severity

Medium

Analysis Summary

CVE-2022-20821

Cisco IOS XR could allow a remote attacker to bypass security restrictions, caused by an issue the health check RPM opening TCP port 6379 by default upon activation. By connecting to the Redis instance on the open port, an attacker could exploit this vulnerability to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database.

Impact

  • Security Bypass

Indicators Of Compromise

CVE

  • CVE-2022-20821

Affected Vendors

  • Cisco

Affected Products

  • Cisco IOS XR 7.3.3

Remediation

Refer to Cisco Security Advisory for patch, upgrade or suggested workaround information.

Cisco Security Advisory

  • Services
    • Assess
      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
      • Secure Architecture Design & Review
      • Red Team Assessment
      • Purple Team Assessment
      • Social Engineering
      • Source Code Review
    • Respond
      • Incident Response
      • Incident Analysis
  • Transform
    • SOC Consultancy
    •     SOC Maturity Assessment
    •     SOC Model Evaluation
    •     SOC Gap Analysis
    •     SIEM Gap Analysis
    •     SIEM Optimization
    •     SOC Content Pack
  • Train
    • Security Awareness and Training
    • Tabletop Exercise
    • Simulated Cyber Attack Exercises
  • Managed Security
    • Managed Security Monitoring
      • Remote SOC
      • Onsite SOC
      • Hybrid SOC
    • Managed Security Services
      • Managed Detection and Response
      • Managed Endpoint Detection and Response
      • Managed Threat Intelligence
      • Managed Threat Hunting
      • Managed Risk-Based SOAR
      • Managed Penetration Testing
  • Solutions
  • Resources
    • Blog
    • Threat Advisory
  • Company
    • About Us
    • Careers
    • Contact
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