Code execution via unchecked DWG record length
Published Jan 10, 2023 · Updated Feb 28, 2025
Heap-based buffer overflow in Microsoft Office Visio allows remote attackers to execute code when a user opens a crafted DWG file. During DWG parsing, Visio copies attacker-controlled data into a fixed-length heap buffer without validating the supplied length. Exploitation requires a user to visit malicious content or open the file, after which code runs in the current process context.
Summary
What happened
Heap-based buffer overflow in Microsoft Office Visio allows remote attackers to execute code when a user opens a crafted DWG file. During DWG parsing, Visio copies attacker-controlled data into a fixed-length heap buffer without validating the supplied length. Exploitation requires a user to visit malicious content or open the file, after which code runs in the current process context.
The record
- CVE
- CVE-2023-21737
- Published
- Jan 10, 2023
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft Visio 2013
- Classifications
- CWE-122, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 10, 2023CVE publishedPublication date reported by the CVE source.
- Feb 28, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.0.1 <15.0.5519.1000
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.
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Technologies
Your stack
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Your stack
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