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Rewterz Threat Alert – Happy New Year Phishing Emails
January 4, 2021
Rewterz Threat Alert – AZORult Latest IOCs
January 5, 2021

Rewterz Threat Advisory – Linux Kernel Privilege Escalation

January 5, 2021

Severity

High

Analysis Summary

Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by an use-after-free flaw in the handling of file descriptors in io_uring. By sending a specially-crafted request, an authenticated attacker could exploit this vulnerability to gain elevated privileges and execute arbitrary code in the context of the kernel.

Impact

Privilege escalation

Affected Vendors

Linux

Affected Products

Linux Kernel 5.10

Remediation

Upgrade to the latest version of Linux Kernel (5.10.2 or later)

  • 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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