CVE-2024-39917: xrdp Brute Force — Fix

Description

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.

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CVSS v3.1 Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L

Weakness Type (CWE)

CWE-307 CWE-307

Affected Products

Vendor	Product	Versions
neutrinolabs	xrdp	< 0.10.0

References

Advisories & Patches

https://github.com/neutrinolabs/xrdp/commit/19c111c74c913ecc6e4ba9a738ed929a79d2ae8f https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-7w22-h4w7-8j5j https://github.com/neutrinolabs/xrdp/commit/19c111c74c913ecc6e4ba9a738ed929a79d2ae8f https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-7w22-h4w7-8j5j

Other References

https://lists.debian.org/debian-lts-announce/2025/05/msg00018.html

Frequently Asked Questions

What is CVE-2024-39917? +

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. It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2024-39917? +

CVE-2024-39917 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-39917? +

CVE-2024-39917 affects products from neutrinolabs, specifically: xrdp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-39917? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-39917