Improper Restriction of Excessive Authentication Attempts in xrdp - CVE-2024-39917

Vulnerability identifier: #VU94665

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2024-39917

CWE-ID: CWE-307

Exploitation vector: Remote access

Exploit availability: No public exploit available

Affected software:
xrdp
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
Basesystem Module
openSUSE Leap
Ubuntu
Anolis OS
xrdp (Ubuntu package)
xrdp
xrdp-debugsource
xrdp-debuginfo
libpainter0
libpainter0-debuginfo
librfxencode0-debuginfo
librfxencode0
xrdp-devel
xrdp-selinux
xrdp-doc

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper restriction of excessive authentication attempts within the MaxLoginRetry parameter in /etc/xrdp/sesman.ini. A remote attacker can make an infinite number of login attempts.

Install updates from vendor's website.

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