Privilege escalation via writable installed binaries
Published Jun 8, 2021 · Updated Aug 3, 2024
Elevation of privilege in Microsoft Kubernetes Tools before 1.3.1 allows local users to gain higher privileges through installed binaries. The extension's dependency installer leaves downloaded executables with write permissions that let a lower-privileged user replace them before later execution. Exploitation requires local low-privileged access and subsequent user interaction that runs a replaced binary at the victim's privilege level.
Summary
What happened
Elevation of privilege in Microsoft Kubernetes Tools before 1.3.1 allows local users to gain higher privileges through installed binaries. The extension's dependency installer leaves downloaded executables with write permissions that let a lower-privileged user replace them before later execution. Exploitation requires local low-privileged access and subsequent user interaction that runs a replaced binary at the victim's privilege level.
The record
- CVE
- CVE-2021-31938
- Published
- Jun 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Microsoft
- Product
- Kubernetes Tools
- Classifications
- T1574.005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 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=1.0.0 <1.3.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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