CVE & CISA-KEV Catalog

CVE-2023-42822

MEDIUM
4.6
CVSS v3
NVD

Description

xrdp is an open source remote desktop protocol server. Access to the font glyphs in xrdp_painter.c is not bounds-checked . Since some of this data is controllable by the user, this can result in an out-of-bounds read within the xrdp executable. The vulnerability allows an out-of-bounds read within a potentially privileged process. On non-Debian platforms, xrdp tends to run as root. Potentially an out-of-bounds write can follow the out-of-bounds read. There is no denial-of-service impact, providing xrdp is running in forking mode. This issue has been addressed in release 0.9.23.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CWE-125Out-of-bounds Read

How to fix

Remediation Available
xrdpDebian
Fixed in:0.9.21.1-1~deb11u2CVE-2023-42822
Fixed in:0.9.21.1-1+deb12u1CVE-2023-42822
Fixed in:0.9.24-2CVE-2023-42822
Fixed in:0.9.24-2CVE-2023-42822
xorgxrdpUbuntu
Fixed in:0.9.5-2ubuntu0.1~esm3USN-8476-1
xrdpUbuntu
Fixed in:0.6.0-1ubuntu0.1+esm3USN-6474-1
Fixed in:0.6.1-2ubuntu0.3+esm3USN-6474-1
Fixed in:0.9.5-2ubuntu0.1~esm3USN-8476-1
Fixed in:0.9.5-2ubuntu0.1~esm2USN-6474-1
Fixed in:0.9.12-1ubuntu0.1+esm2USN-8476-1
Fixed in:0.9.12-1ubuntu0.1+esm1USN-6474-1
Fixed in:0.9.17-2ubuntu2+esm1USN-6474-1
Fixed in:0.9.17-2ubuntu3+esm2USN-8476-1
Fixed in:0.9.24-4ubuntu0.1~esm1USN-8476-1
Fixed in:0.10.1-3.1+deb13u1build0.25.10.1USN-8476-1
xrdp-pulseaudio-installerUbuntu
Fixed in:0.9.5-2ubuntu0.1~esm3USN-8476-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityLow
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Exploit Intelligence

0.63%probability of exploitation in 30 days
46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Vendor Advisory1
Other references1

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2014-0160High7.5100%KEVFix
CVE-2025-5777High7.5100%KEV + RansomFix
CVE-2021-4034High7.895%KEVFix
CVE-2023-21769High7.592%-Fix
CVE-2023-49285High8.689%-Fix
CVE-2020-8794Critical9.889%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.