CVE-2020-4032— Integer casting vulnerability in `update_recv_secondary_order` in FreeRDP
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I. Basic Information for CVE-2020-4032
Vulnerability Information
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Vulnerability Title
Integer casting vulnerability in `update_recv_secondary_order` in FreeRDP
Source: NVD (National Vulnerability Database)
Vulnerability Description
In FreeRDP before version 2.1.2, there is an integer casting vulnerability in update_recv_secondary_order. All clients with +glyph-cache /relax-order-checks are affected. This is fixed in version 2.1.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
数值类型间的不正确转换
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 2.1.2之前版本中的update_recv_secondary_order存在安全漏洞。目前尚无此漏洞的相关信息，请随时关注CNNVD或厂商公告。
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-2020-4032
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Same Patch Batch · FreeRDP · 2020-06-22 · 9 CVEs total
| CVE-2020-11095 | 3.5 LOW | Global OOB read in update_recv_primary_order in FreeRDP |
| CVE-2020-11096 | 3.5 LOW | Global OOB read in update_read_cache_bitmap_v3_order in FreeRDP |
| CVE-2020-11097 | 3.5 LOW | OOB read in ntlm_av_pair_get in FreeRDP |
| CVE-2020-11098 | 3.5 LOW | Out-of-bound read in glyph_cache_put in FreeRDP |
| CVE-2020-11099 | 3.5 LOW | OOB Read in license_read_new_or_upgrade_license_packet in FreeRDP |
| CVE-2020-4030 | 3.5 LOW | OOB read in `TrioParse` in FreeRDP |
| CVE-2020-4031 | 3.5 LOW | Use-After-Free in gdi_SelectObject in FreeRDP |
| CVE-2020-4033 | 3.1 LOW | OOB Read in RLEDECOMPRESS in FreeRDP |
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-681
- CVE-2026-26178
Windows Advanced Rasterization Platform Elevation of Privile - CVE-2026-34945
Wasmtime leaks host data with 64-bit tables and Winch - CVE-2026-24174
NVIDIA Triton Inference Server 安全漏洞 - CVE-2026-34610
leancrypto: Integer truncation in X.509 name parser enables - CVE-2026-34550
iccDEV: UB at IccIO.cpp
V. Comments for CVE-2020-4032
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