Security features bypass in xrdp - CVE-2023-40184
Published: August 31, 2023
Vulnerability identifier: #VU80197
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-40184
CWE-ID: CWE-254
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
xrdp
xrdp
Software vendor:
neutrinolabs
neutrinolabs
Description
The vulnerability allows a remote user to bypass implemented security restrictions.
The vulnerability exists due to improper handling of session restrictions inside the xrdp-sesman. A remote user can bypass session restrictions, such as max concurrent sessions per user enforced by PAM.
Remediation
Install updates from vendor's website.
External links
- https://github.com/neutrinolabs/xrdp/releases/tag/v0.9.23
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
- https://github.com/neutrinolabs/xrdp/commit/a111a0fdfe2421ef600e40708b5f0168594cfb23
- https://github.com/neutrinolabs/xrdp/blame/9bbb2ec68f390504c32f2062847aa3d821a0089a/sesman/sesexec/session.c#L571C5-L571C19