Vulnerability in FreeRDP less than or equal to (CVE-2020-11038)

Summary

Vulnerability in FreeRDP less than or equal to (CVE-2020-11038). 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 less than or equal to 2.0.0, an Integer Overflow to Buffer Overflow exists. When using /video redirection, a manipulated server can instruct the client to allocate a buffer with a smaller size than requested due to an integer overflow in size calculation. With later messages, the server can manipulate the client to write data out of bound to the previously allocated buffer. This has been patched 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-2020-11038 has been found in FreeRDP less than or equal to.
Risk of unauthorized operations or information disclosure.
What to do: upgrade FreeRDP less than or equal to to 2.1.0 or later.
If unsure, ask your IT team or search "FreeRDP less than or equal to CVE-2020-11038" on the vendor's site.

CVE-2020-11038 (FreeRDP less than or equal to)
Attack vector: remote (network-reachable) / no user interaction
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 less than or equal to.

📍 Affected scope

Check the vendor advisory for the affected versions of FreeRDP less than or equal to.

🔥 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. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで FreeRDP less than or equal to を使っているサービスとバージョンを洗い出す。
2
Apply patch patch
```
Upgrade FreeRDP less than or equal to 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。

References

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