Vulnerability in FreeRDP (CVE-2020-11089)

Summary

Vulnerability in FreeRDP (CVE-2020-11089). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 2.1.0 or later.

Original description

The description as published by the source.

In FreeRDP before 2.1.0, there is an out-of-bound read in irp functions (parallel_process_irp_create, serial_process_irp_create, drive_process_irp_write, printer_process_irp_write, rdpei_recv_pdu, serial_process_irp_write). This has been fixed in 2.1.0.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

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 CVE-2020-11089 has been found in FreeRDP.
Risk of unauthorized operations or information disclosure.
What to do: upgrade FreeRDP to 2.1.0 or later.
If unsure, ask your IT team or search "FreeRDP CVE-2020-11089" on the vendor's site.

CVE-2020-11089 (FreeRDP)
Attack vector: remote (network-reachable)
Patched: 2.1.0 — 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.

❓ What is the problem

A vulnerability (unclassified) exists in FreeRDP.

📍 Affected scope

Check the vendor advisory for the affected versions of FreeRDP.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 2.1.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'FreeRDP' . 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 exposure identify
```
grep -r 'FreeRDP' . | 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 FreeRDP 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 patch patch
```
Upgrade FreeRDP to 2.1.0
```
ステージング環境で 2.1.0 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 verification verify
```
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。

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2020-11089 freerdp2 Fixed in: 2.1.1+dfsg1-1

References

advisory lists.opensuse.org
advisory github.com
advisory lists.debian.org
patch github.com
patch github.com