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Rewterz Threat Alert – Covid-19 Themed Malicious URLs
January 5, 2021
Rewterz Threat Alert – BITTER APT Group Active Again in South Asia
January 6, 2021

Rewterz Threat Advisory – CVE-2020-17519 – Apache Flink directory traversal

January 6, 2021

Severity

High

Analysis Summary

CVE-2020-17519

Apache Flink could allow a remote attacker to traverse directories on the system, caused by improper validation of user request by the REST API. An attacker could send a specially-crafted URL request containing “dot dot” sequences (/../) to read arbitrary files on the system.

Impact

Obtain Information

Affected Vendors

Apache

Affected Products

  • Apache Flink 1.11.0
  • Apache Flink 1.11.1
  • Apache Flink 1.11.2

Remediation

Upgrade to the latest version of Apache Flink (1.11.3, 1.12.0 or later).

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    • 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
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