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.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 17 Apr 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Neutrinolabs
Neutrinolabs xrdp |
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| Vendors & Products |
Neutrinolabs
Neutrinolabs xrdp |
Fri, 17 Apr 2026 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode | |
| Weaknesses | CWE-354 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-04-17T19:27:39.809Z
Reserved: 2026-03-10T22:02:38.854Z
Link: CVE-2026-32105
No data.
Status : Received
Published: 2026-04-17T20:16:33.517
Modified: 2026-04-17T20:16:33.517
Link: CVE-2026-32105
No data.
OpenCVE Enrichment
Updated: 2026-04-17T20:30:15Z
Weaknesses