neutrinolabs xrdp up to 0.9.x Configuration Parameter /etc/xrdp/sesman.ini MaxLoginRetry excessive authentication

Summaryinfo

A vulnerability, which was classified as problematic, was found in neutrinolabs xrdp up to 0.9.x. This affects an unknown function of the file /etc/xrdp/sesman.ini of the component Configuration Parameter Handler. Executing a manipulation of the argument MaxLoginRetry can lead to excessive authentication. This vulnerability appears as CVE-2024-39917. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in neutrinolabs xrdp up to 0.9.x. This vulnerability affects some unknown functionality of the file /etc/xrdp/sesman.ini of the component Configuration Parameter Handler. The manipulation of the argument MaxLoginRetry with an unknown input leads to a excessive authentication vulnerability. The CWE definition for the vulnerability is CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. As an impact it is known to affect confidentiality. CVE summarizes:

xrdp is an open source RDP server. xrdp versions prior to 0.10.0 have a vulnerability that allows attackers to make an infinite number of login attempts. The number of max login attempts is supposed to be limited by a configuration parameter `MaxLoginRetry` in `/etc/xrdp/sesman.ini`. However, this mechanism was not effectively working. As a result, xrdp allows an infinite number of login attempts.

The advisory is available at github.com. This vulnerability was named CVE-2024-39917 since 07/02/2024. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1110.001 by the MITRE ATT&CK project.

By approaching the search of inurl:etc/xrdp/sesman.ini it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 215171 (SUSE SLES15 Security Update : xrdp (SUSE-SU-2025:0350-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.10.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (215171). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• neutrinolabs

Name

• xrdp

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9

Website

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

CPE 2.3info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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