CVE-2023-40187 - CVE House

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Status published High CVE-2023-40187

Use-After-Free in FreeRDP

7.3 CVSS

Vulnerability Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions of the 3.x beta branch are subject to a Use-After-Free issue in the `avc420_ensure_buffer` and `avc444_ensure_buffer` functions. If the value of `piDstSize[x]` is 0, `ppYUVDstData[x]` will be freed. However, in this case `ppYUVDstData[x]` will not have been updated which leads to a Use-After-Free vulnerability. This issue has been addressed in version 3.0.0-beta3. Users of the 3.x beta releases are advised to upgrade. There are no known workarounds for this vulnerability.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from FreeRDP

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Potential Heap Out-of-Bounds Read in freerdp_certificate_data_hash_ via Unsafe _snprintf Usage

FreeRDP rdp_redirection_read_base64_wchar out of bound read

FreeRDP rdp_write_logon_info_v1 NULL access

FreeRDP zgfx_decompress out of memory vulnerability

freerdp_image_copy out of bound read

Affected Vendor

FreeRDP

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Affected Software

FreeRDP

Vulnerable Versions:

>= 3.0.0-beta1, < 3.0.0-beta3

Timeline

Official Publish: August 31st, 2023

Last Modified: February 13th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1055 Process Injection

Defense Evasion

T1105 Ingress Tool Transfer

Command and Control

T1485 Data Destruction