neutrinolabs xrdp up to 0.10.5 Domain Name xrdp.ini domain_user_separator heap-based overflow

Summaryinfo

A vulnerability was found in neutrinolabs xrdp up to 0.10.5. It has been classified as critical. The affected element is the function domain_user_separator of the file xrdp.ini of the component Domain Name Handler. This manipulation causes heap-based overflow. This vulnerability is handled as CVE-2026-32624. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in neutrinolabs xrdp up to 0.10.5. Affected by this vulnerability is the function domain_user_separator of the file xrdp.ini of the component Domain Name Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-32624 since 03/12/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:xrdp.ini it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.10.6 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• neutrinolabs

Name

• xrdp

Version

• 0.10.0
• 0.10.1
• 0.10.2
• 0.10.3
• 0.10.4
• 0.10.5

Website

• Product: https://github.com/neutrinolabs/xrdp/

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