CVE-2023-40184

2.6 LOW
Published: August 30, 2023 Modified: November 03, 2025
View on NVD

Description

xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/neutrinolabs/xrdp/blame/9bbb2ec68f390504c32f2062847aa3d821a0089a/sesman/sesexec/session.c#L571C5-L571C19
Source: security-advisories@github.com
Product
https://github.com/neutrinolabs/xrdp/commit/a111a0fdfe2421ef600e40708b5f0168594cfb23
Source: security-advisories@github.com
Patch
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
Source: security-advisories@github.com
Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOT237TIHTHPX5YNIWLVNINOEYC7WMG2/
Source: security-advisories@github.com
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5IXMQODV3OIJ7DRQBUQV7PUKNT7SH36/
Source: security-advisories@github.com
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/URO3FKTFBPNKFARAQBEJLI4MH6YS35P5/
Source: security-advisories@github.com
Mailing List
https://github.com/neutrinolabs/xrdp/blame/9bbb2ec68f390504c32f2062847aa3d821a0089a/sesman/sesexec/session.c#L571C5-L571C19
Source: af854a3a-2127-422b-91ae-364da2661108
Product
https://github.com/neutrinolabs/xrdp/commit/a111a0fdfe2421ef600e40708b5f0168594cfb23
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00018.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOT237TIHTHPX5YNIWLVNINOEYC7WMG2/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5IXMQODV3OIJ7DRQBUQV7PUKNT7SH36/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/URO3FKTFBPNKFARAQBEJLI4MH6YS35P5/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List

13 reference(s) from NVD

Quick Stats

CVSS v3 Score
2.6 / 10.0
EPSS (Exploit Probability)
0.0%
15th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-755

Affected Vendors

neutrinolabs

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