Client memory disclosure via unchecked bitmap header
Published May 7, 2020 · Updated Aug 4, 2024
Out-of-bounds read in FreeRDP after 1.0 and before 2.0.0 allows attackers to render client memory as screen colors. The update_read_bitmap_data function reads four 16-bit compression-header fields after its initial 18-byte check without confirming that eight bytes remain. Reachability requires the client to process bitmap data from a malicious RDP server; the documented consequence is memory-derived color output, not direct data transfer or modification.
Summary
What happened
Out-of-bounds read in FreeRDP after 1.0 and before 2.0.0 allows attackers to render client memory as screen colors. The update_read_bitmap_data function reads four 16-bit compression-header fields after its initial 18-byte check without confirming that eight bytes remain. Reachability requires the client to process bitmap data from a malicious RDP server; the documented consequence is memory-derived color output, not direct data transfer or modification.
The record
- CVE
- CVE-2020-11045
- Published
- May 7, 2020
- Updated
- Aug 4, 2024
- Vendor
- FreeRDP
- Product
- FreeRDP
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- May 7, 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=> 1.0, < 2.0.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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