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Chaotic Eclipse discloses MiniPlasma zero-day, suggesting a missing or undone 2020 Windows security fix

Security Affairs
Actively Exploited
WindowsCVEZero-dayMicrosoftExploitVulnerabilityPrivilege Escalation

Overview

A security researcher known as Chaotic Eclipse has disclosed a serious zero-day vulnerability in Windows called MiniPlasma, which allows attackers to gain SYSTEM privileges on fully updated Windows 11 systems. This flaw, affecting the 'cldflt.sys' file, was believed to have been patched back in 2020 under the CVE-2020-17103 designation, but it appears that the fix was either incomplete or not properly implemented. The existence of a proof-of-concept exploit for this vulnerability raises significant concerns for users and organizations, as it could allow malicious actors to escalate their privileges and potentially take control of affected systems. This issue affects all patched versions of Windows 11, meaning a wide range of users are at risk. Companies should prioritize reviewing their security protocols and consider additional monitoring to mitigate potential exploitation.

Key Takeaways

  • Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
  • Affected Systems: Windows 11 systems, specifically those using the 'cldflt.sys' driver.
  • Action Required: Users should install any available security updates from Microsoft and monitor for any new patches addressing CVE-2020-17103.
  • Timeline: Newly disclosed

Original Article Summary

MiniPlasma: a Windows SYSTEM privilege escalation believed patched in 2020 (CVE-2020-17103) is still fully working on every patched Windows 11. Once again, security researcher Chaotic Eclipse has released a proof-of-concept exploit for a new Windows privilege escalation zero-day called MiniPlasma, which can grant attackers SYSTEM privileges on fully patched systems. The flaw affects “cldflt.sys,” the […]

Impact

Windows 11 systems, specifically those using the 'cldflt.sys' driver.

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Users should install any available security updates from Microsoft and monitor for any new patches addressing CVE-2020-17103. Additional security measures include enhancing system monitoring and access controls to detect potential exploitation attempts.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Windows, CVE, Zero-day, and 4 more.

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