Privilege escalation via XML deserialization bypass
Published Jun 14, 2023 · Updated Jan 1, 2025
XML deserialization in Microsoft .NET, .NET Framework, PowerShell, and Visual Studio allows remote attackers to elevate privileges. The DataSet and DataTable XML deserializers honor an extended type allow-list in a way that lets crafted XML bypass intended restrictions. Exploitation requires user interaction and an application or administrator to add specific triggering types to the default allow-list; default configuration is not susceptible.
Summary
What happened
XML deserialization in Microsoft .NET, .NET Framework, PowerShell, and Visual Studio allows remote attackers to elevate privileges. The DataSet and DataTable XML deserializers honor an extended type allow-list in a way that lets crafted XML bypass intended restrictions. Exploitation requires user interaction and an application or administrator to add specific triggering types to the default allow-list; default configuration is not susceptible.
The record
- CVE
- CVE-2023-24936
- Published
- Jun 14, 2023
- Updated
- Jan 1, 2025
- Vendor
- Microsoft
- Product
- Microsoft .NET Framework 3.5 and 4.8.1
- Classifications
- T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 14, 2023CVE publishedPublication date reported by the CVE source.
- Jan 1, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=4.8.1 <4.8.9166.0
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.
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Technologies
Your stack
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Your stack
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