xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode
概要
xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
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.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2026-32105 xrdp
- Ubuntu UBUNTU-CVE-2026-32105 xrdp
参照URL
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- web github.com