CVE-2022-23477: Buffer Overflow in xrdp

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-09 · updated 2026-06-17
Weakness: CWE-120

Description

xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protocol (RDP). xrdp < v0.9.21 contain a buffer over flow in audin_send_open() function. There are no known workarounds for this issue. Users are advised to upgrade.

Affected products

Debian Linux: 11.0
neutrinolabs xrdp: before 0.9.21 — fixed in 0.9.21

How to fix

Upgrade to a fixed version: neutrinolabs xrdp 0.9.21. Check the vendor advisory for mitigations.

References

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-hqw2-jx2c-wrr2
https://www.debian.org/security/2023/dsa-5502
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-hqw2-jx2c-wrr2
https://www.debian.org/security/2023/dsa-5502

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