xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman
Résumé
xrdp: Authenticated RCE via unsanitized AlternateShell execution in xrdp-sesman
Description d'origine
La description telle que publiée par la source (souvent en anglais).
xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled (which is the default when not explicitly configured), xrdp accepts a client-supplied AlternateShell value and executes it via /bin/sh -c during session initialization. This results in shell-interpreted execution of unsanitized, user-controlled input. This behavior effectively provides a scriptable remote command execution primitive over RDP within the security context of the authenticated user, occurring prior to normal window manager startup. This can bypass expected session initialization flows and operational assumptions that restrict execution to interactive desktop environments. This issue has been fixed in version 0.10.6.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
État des correctifs par distribution
Paquets corrigés publiés par chaque distribution pour cette CVE
- Debian DEBIAN-CVE-2026-33145 xrdp
- Ubuntu UBUNTU-CVE-2026-33145 xrdp
Références
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- web github.com