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CVE-2023-40187— Use-After-Free in FreeRDP

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 存在资源管理错误漏洞，该漏洞源于在 avc420_ensure_buffer 和 avc444_ensure_buffer 函数中存在释放后重用问题。

CVSS 7.3 · High EPSS 1.16% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-40187

Vulnerability Information
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Vulnerability Title
Use-After-Free in FreeRDP
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 存在资源管理错误漏洞，该漏洞源于在 avc420_ensure_buffer 和 avc444_ensure_buffer 函数中存在释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP >= 3.0.0-beta1, < 3.0.0-beta3 -

II. Public POCs for CVE-2023-40187

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9290 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2023-40187

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Vendor Advisories for CVE-2023-40187 (2)

Other References for CVE-2023-40187 (1)

Same Patch Batch · FreeRDP · 2023-08-31 · 17 CVEs total

CVE-2023-39355 7.0 HIGH FreeRDP Use-After-Free in RDPGFX_CMDID_RESETGRAPHICS
CVE-2023-40567 6.5 MEDIUM Out-Of-Bounds Write in FreeRDP
CVE-2023-40569 6.5 MEDIUM Out-Of-Bounds Write in FreeRDP
CVE-2023-40574 6.5 MEDIUM Out-Of-Bounds Write in FreeRDP
CVE-2023-40186 6.5 MEDIUM IntegerOverflow leading to Out-Of-Bound Write Vulnerability in FreeRDP
CVE-2023-39354 5.9 MEDIUM FreeRDP Out-Of-Bounds Read in nsc_rle_decompress_data
CVE-2023-39350 5.9 MEDIUM Incorrect offset calculation leading to denial of service in FreeRDP
CVE-2023-40576 5.3 MEDIUM Out-Of-Bounds Read in FreeRDP
CVE-2023-40575 5.3 MEDIUM Out-Of-Bounds Read in FreeRDP
CVE-2023-40188 5.3 MEDIUM Out-Of-Bounds Read in FreeRDP
CVE-2023-40181 5.3 MEDIUM Integer-Underflow leading to Out-Of-Bound Read in FreeRDP
CVE-2023-39356 5.3 MEDIUM Missing offset validation leading to Out-of-Bounds Read in FreeRDP
CVE-2023-39352 5.3 MEDIUM Invalid offset validation leading to Out Of Bound Write in FreeRDP
CVE-2023-39353 5.3 MEDIUM Missing offset validation leading to Out Of Bound Read in FreeRDP
CVE-2023-39351 5.3 MEDIUM FreeRDP Null Pointer Dereference leading denial of service
CVE-2023-40589 4.3 MEDIUM FreeRDP Global-Buffer-Overflow in ncrush_decompress

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-416

V. Comments for CVE-2023-40187

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