Out-of-bounds read via zero-dimension image copy
Published Apr 23, 2024 · Updated Nov 3, 2025
Out-of-bounds read in FreeRDP clients before 3.5.1 allows remote attackers to read beyond a buffer via zero-width or zero-height images. The freerdp_image_copy routine continues into image-copy processing instead of returning when either dimension is zero. A malicious RDP endpoint can supply the dimensions without authentication or user interaction; published sources establish no data exfiltration or code execution.
Summary
What happened
Out-of-bounds read in FreeRDP clients before 3.5.1 allows remote attackers to read beyond a buffer via zero-width or zero-height images. The freerdp_image_copy routine continues into image-copy processing instead of returning when either dimension is zero. A malicious RDP endpoint can supply the dimensions without authentication or user interaction; published sources establish no data exfiltration or code execution.
The record
- CVE
- CVE-2024-32659
- Published
- Apr 23, 2024
- Updated
- Nov 3, 2025
- Vendor
- FreeRDP
- Product
- FreeRDP
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 23, 2024CVE publishedPublication date reported by the CVE source.
- Nov 3, 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=0 <3.5.1
- Affected versionversion=< 3.5.1
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
- OSS-Fuzz testcase 6156779722440704proof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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