Remote code execution via ASF object type confusion
Published Feb 11, 2020 · Updated Aug 4, 2024
Type confusion in Windows Media Foundation allows remote attackers to execute code when a user opens a crafted ASF file. CASFPacketParser::CreateExtensionSystemsList treats a smaller ASF Stream Properties object as an Extended Stream Properties object, reads extensionSystemCount out of bounds, and uses that value to control a loop. Exploitation requires user interaction with malformed media and can corrupt memory within the affected process, enabling code execution in that user's security context.
Summary
What happened
Type confusion in Windows Media Foundation allows remote attackers to execute code when a user opens a crafted ASF file. CASFPacketParser::CreateExtensionSystemsList treats a smaller ASF Stream Properties object as an Extended Stream Properties object, reads extensionSystemCount out of bounds, and uses that value to control a loop. Exploitation requires user interaction with malformed media and can corrupt memory within the affected process, enabling code execution in that user's security context.
The record
- CVE
- CVE-2020-0738
- Published
- Feb 11, 2020
- Updated
- Aug 4, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1909
- Classifications
- CWE-787, CWE-704, T1203, T1204.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 11, 2020CVE 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?
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- Affected versionversion=unspecified
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
- Malformed ASF proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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