CVE-2024-32040— FreeRDP vulnerable to integer underflow in nsc_rle_decode
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数下溢(超界折返)
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2024-32040
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- https://github.com/FreeRDP/FreeRDP/pull/10077x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.5.0x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/releases/tag/2.11.6x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-23c5-cp23-h2h5x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2024-32040
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
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same vendor: FreeRDP
- CVE-2026-40254
FreeRDP: contains_dotdot() off-by-one allows drive channel p - CVE-2026-33995
FreeRDP: Possible double free in kerberos_AcceptSecurityCont - CVE-2026-33987
FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write - CVE-2026-33986
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write - CVE-2026-33985
FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
Same weakness: CWE-191
- CVE-2026-7736
osrg GoBGP mrt.go parseRibEntry integer underflow - CVE-2026-33845
Gnutls: gnutls: denial of service via dtls zero-length fragm - CVE-2026-7424
Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Pl - CVE-2026-7423
Integer Underflow in ICMP Echo Reply Processing in FreeRTOS- - CVE-2026-6914
MD5 checksum creation may cause availability loss
V. Comments for CVE-2024-32040
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