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CVE-2022-23481· NVD / CVE Program· CNA GitHub_M

Out-of-Bound Read in xrdp

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 Out of Bound Read in xrdp_caps_process_confirm_active() function. There are no known workarounds for this issue. Users are advised to upgrade.

CriticalCVSS 9.1 · v3.1—No exploit Fix available

Noroxi analysis

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Published
Dec 9, 2022
Updated
Jun 17, 2026
EPSS
0.8% · 54th percentile
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Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.1
CNA · GitHub_M
0.0
9.1 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
neutrinolabsxrdp
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • neutrinolabs xrdpbefore 0.9.21

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • neutrinolabs xrdp

    • < 0.9.21affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10xrdpbefore 0.9.9-1+deb10u30.9.9-1+deb10u3
Debian:11xrdpbefore 0.9.21.1-1~deb11u10.9.21.1-1~deb11u1
Debian:12xrdpbefore 0.9.21.1-10.9.21.1-1
openSUSE:Tumbleweedxrdpbefore 0.9.20-4.10.9.20-4.1
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSSxrdpbefore 0.9.6-150000.4.11.10.9.6-150000.4.11.1
SUSE:Linux Enterprise Module for Basesystem 15 SP4xrdpbefore 0.9.13.1-150200.4.15.10.9.13.1-150200.4.15.1
SUSE:Linux Enterprise Module for Basesystem 15 SP4xrdpbefore 0.9.13.1-150200.4.15.10.9.13.1-150200.4.15.1
SUSE:Linux Enterprise Server 12 SP2-BCLxrdpbefore 0.9.0~git.1456906198.f422461-16.23.20.9.0~git.1456906198.f422461-16.23.2
SUSE:Linux Enterprise Server 12 SP5xrdpbefore 0.9.10-3.8.10.9.10-3.8.1
SUSE:OpenStack Cloud 9xrdpbefore 0.9.0~git.1456906198.f422461-21.30.20.9.0~git.1456906198.f422461-21.30.2

Same product

neutrinolabs: all records

Other highest-scoring records for the same primary product.

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:xrdp0.9.21.1-1 · Debian:12Package registry (OSV)
opensuse:xrdp0.9.13.1-150200.4.15.1 · openSUSE:Leap 15.4Package registry (OSV)
suse:xrdp0.9.13.1-150200.4.15.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP4Package registry (OSV)
suse:xrdp0.9.6-150000.4.11.1 · SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records