CVE-2026-32105— xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode
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I. Basic Information for CVE-2026-32105
Vulnerability Information
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Vulnerability Title
xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode
Source: NVD (National Vulnerability Database)
Vulnerability Description
xrdp is an open source RDP server. In versions through 0.10.5, xrdp does not implement verification for the Message Authentication Code (MAC) signature of encrypted RDP packets when using the "Classic RDP Security" layer. While the sender correctly generates signatures, the receiving logic lacks the necessary implementation to validate the 8-byte integrity signature, causing it to be silently ignored. An unauthenticated attacker with man-in-the-middle (MITM) capabilities can exploit this missing check to modify encrypted traffic in transit without detection. It does not affect connections where the TLS security layer is enforced. This issue has been fixed in version 0.10.6. If users are unable to immediately upgrade, they should configure xrdp.ini to enforce TLS security (security_layer=tls) to ensure end-to-end integrity.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
完整性检查值验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
xrdp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
xrdp是neutrinolabs开源的一款开源远程桌面协议服务器。 xrdp 0.10.5及之前版本存在安全漏洞，该漏洞源于使用经典RDP安全层时未验证加密RDP数据包的消息认证码签名，可能导致中间人攻击者修改传输中的加密流量。
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 |
|---|---|---|---|---|
| neutrinolabs | xrdp | < 0.10.6 | - |
II. Public POCs for CVE-2026-32105
| # | POC Description | Source Link | Shenlong Link |
|---|
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- Release xrdp v0.10.6 · neutrinolabs/xrdp · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-32105
Same Patch Batch · neutrinolabs · 2026-04-17 · 8 CVEs total
| CVE-2026-32107 | 8.8 HIGH | xrdp: Fail-open privilege drop in sesexec — child processes may execute as root if setuid |
| CVE-2026-33145 | 6.3 MEDIUM | xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman |
| CVE-2026-35512 | xrdp: Heap buffer overflow in EGFX channel | |
| CVE-2026-32624 | xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length | |
| CVE-2026-32623 | xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly | |
| CVE-2026-33689 | xrdp: Pre-authentication out-of-bounds reads in channel parsers | |
| CVE-2026-33516 | xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers |
IV. Related Vulnerabilities
Same product: xrdp
- CVE-2026-35512
xrdp: Heap buffer overflow in EGFX channel - CVE-2026-33689
xrdp: Pre-authentication out-of-bounds reads in channel pars - CVE-2026-33145
xrdp: Authenticated RCE via unsanitized AlternateShell execu - CVE-2026-32624
xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() - CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capabili
Same vendor: neutrinolabs
- CVE-2026-35512
xrdp: Heap buffer overflow in EGFX channel - CVE-2026-33689
xrdp: Pre-authentication out-of-bounds reads in channel pars - CVE-2026-33145
xrdp: Authenticated RCE via unsanitized AlternateShell execu - CVE-2026-32624
xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() - CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capabili
Same weakness: CWE-354
- CVE-2026-32148
Lockfile checksums not verified in Hex allows dependency int - CVE-2026-5479
wolfSSL EVP ChaCha20-Poly1305 AEAD authentication tag - CVE-2026-5504
PKCS7 CBC Padding Oracle — Plaintext Recovery - CVE-2026-26928
Lack of Dynamic Library Validation in SzafirHost - CVE-2026-28498
Authlib: Fail-Open Cryptographic Verification in OIDC Hash B
V. Comments for CVE-2026-32105
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