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CVE-2024-32040— FreeRDP vulnerable to integer underflow in nsc_rle_decode

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 3.5.0 版本之前存在安全漏洞，该漏洞源于使用 NSC 编解码器连接到服务器的基于 FreeRDP 的客户端容易受到整数下溢的影响。

CVSS 8.1 · High EPSS 1.91% · P79

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-32040

Vulnerability Information
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Vulnerability Title
FreeRDP vulnerable to integer underflow in nsc_rle_decode
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. FreeRDP based clients that use a version of FreeRDP prior to 3.5.0 or 2.11.6 and have connections to servers using the `NSC` codec are vulnerable to integer underflow. Versions 3.5.0 and 2.11.6 patch the issue. As a workaround, do not use the NSC codec (e.g. use `-nsc`).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 安全漏洞
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 3.5.0 版本之前存在安全漏洞，该漏洞源于使用 NSC 编解码器连接到服务器的基于 FreeRDP 的客户端容易受到整数下溢的影响。
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, 3.5.0 -

II. Public POCs for CVE-2024-32040

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7587 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2024-32040

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Patches & Fixes for CVE-2024-32040 (1)

Vendor Advisories for CVE-2024-32040 (1)

Mailing List Discussions for CVE-2024-32040 (4)

Other References for CVE-2024-32040 (2)

Same Patch Batch · FreeRDP · 2024-04-22 · 6 CVEs total

CVE-2024-32459 9.8 CRITICAL FreeRDP Out-Of-Bounds Read in ncrush_decompress
CVE-2024-32458 9.8 CRITICAL FreeRDP Out-Of-Bounds Read in planar_skip_plane_rle
CVE-2024-32041 9.8 CRITICAL FreeRDP OutOfBound Read in zgfx_decompress_segment
CVE-2024-32039 9.8 CRITICAL FreeRDP Integer overflow & OutOfBound Write in clear_decompress_residual_data
CVE-2024-32460 8.1 HIGH FreeRDP Out-Of-Bounds Read in interleaved_decompress

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-191

V. Comments for CVE-2024-32040

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