Unauthenticated code execution via Disk Agent overflow
Published Nov 2, 2021 · Updated Aug 3, 2024
Buffer overflow in NEC EXPRESSCLUSTER X 4.3 and earlier for Windows allows remote attackers to execute arbitrary code via a network packet. The Disk Agent mishandles a crafted packet received through its internal protocol and overflows a buffer; NEC has not disclosed the affected routine or copy operation. No authentication or user interaction is required, and successful exploitation runs attacker-controlled code on the cluster server.
Summary
What happened
Buffer overflow in NEC EXPRESSCLUSTER X 4.3 and earlier for Windows allows remote attackers to execute arbitrary code via a network packet. The Disk Agent mishandles a crafted packet received through its internal protocol and overflows a buffer; NEC has not disclosed the affected routine or copy operation. No authentication or user interaction is required, and successful exploitation runs attacker-controlled code on the cluster server.
The record
- CVE
- CVE-2021-20700
- Published
- Nov 2, 2021
- Updated
- Aug 3, 2024
- Vendor
- NEC Corporation
- Product
- EXPRESSCLUSTER X
- Classifications
- CWE-119, CWE-120, T1210
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 2, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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