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Fencer Vulns
critical 9.1

CVE-2022-23477 json

Buffer Overflow in xrdp

published 2022-12-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-28538

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

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.

Patch / fix

  • neutrinolabs xrdp 0.9.21
  • xrdp Debian 14, Debian 13, Debian 12 0.9.21.1-1

debian advisories DEBIAN-CVE-2022-23477

  • xrdp Ubuntu Pro 20.04 LTS 0.9.12-1ubuntu0.1+esm1
  • xrdp Ubuntu Pro 22.04 LTS 0.9.17-2ubuntu2+esm1

ubuntu advisories UBUNTU-CVE-2022-23477

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xrdp SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +12 more 0.9.13.1-150200.4.18.1

suse advisories SUSE-SU-2023:0151-1

  • xrdp openSUSE Tumbleweed 0.9.20-4.1

opensuse advisories openSUSE-SU-2024:12602-1

  • xrdp Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 0.9.21.1-r0

alpine advisories ALPINE-CVE-2022-23477

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-23477 updated cvss 9.1

xrdp: buffer overflow in audin_send_open()

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.93% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • neutrinolabs xrdp

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.