Vulnerability in xrdp
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as DEBIAN-CVE-2020-4044 has been found in xrdp.
Successful exploitation can lead to full system takeover.
What to do: upgrade xrdp to 0.9.12-1.1 or later.
If unsure, ask your IT team or search "xrdp DEBIAN-CVE-2020-4044" on the vendor's site.
DEBIAN-CVE-2020-4044 (xrdp)
Attack vector: local / no user interaction
Patched: 0.9.12-1.1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in xrdp.
Check the vendor advisory for the affected versions of xrdp.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 0.9.12-1.1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'xrdp' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1
Identify exposureidentify
grep -r 'xrdp' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
xrdpを grep し、稼働しているサービス・バージョンを把握する。 -
2
Apply patchpatch
Upgrade xrdp to 0.9.12-1.1ステージング環境で 0.9.12-1.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3
Post-deployment verificationverify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Debian:12 | xrdp |
< 0.9.12-1.1 |
0.9.12-1.1 |
| Debian:13 | xrdp |
< 0.9.12-1.1 |
0.9.12-1.1 |
| Debian:14 | xrdp |
< 0.9.12-1.1 |
0.9.12-1.1 |
Original description The description as published by the source.
The xrdp-sesman service before version 0.9.13.1 can be crashed by connecting over port 3350 and supplying a malicious payload. Once the xrdp-sesman process is dead, an unprivileged attacker on the server could then proceed to start their own imposter sesman service listening on port 3350. This will allow them to capture any user credentials that are submitted to XRDP and approve or reject arbitrary login credentials. For xorgxrdp sessions in particular, this allows an unauthorized user to hijack an existing session. This is a buffer overflow attack, so there may be a risk of arbitrary code execution as well.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org