Remote code execution via freed RDP object
Published Dec 15, 2021 · Updated Aug 4, 2024
Use-after-free in Microsoft Windows Remote Desktop Client allows remote attackers to execute code when a user connects to a malicious RDP server. The client reuses freed memory while processing specially crafted RDP packets received from the server, enabling memory corruption and arbitrary code execution. Exploitation requires user interaction to initiate the RDP connection, and successful code runs in the client user's security context.
Summary
What happened
Use-after-free in Microsoft Windows Remote Desktop Client allows remote attackers to execute code when a user connects to a malicious RDP server. The client reuses freed memory while processing specially crafted RDP packets received from the server, enabling memory corruption and arbitrary code execution. Exploitation requires user interaction to initiate the RDP connection, and successful code runs in the client user's security context.
The record
- CVE
- CVE-2021-43233
- Published
- Dec 15, 2021
- Updated
- Aug 4, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 15, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 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=10.0.0 <10.0.10240.19145
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
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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