# LrrK Kinematic Software Danger Report

**LRRK Watch / Software Assurance** — Monthly filing.

| Field | Value |
| --- | --- |
| Collection cutoff | 30 September 2021 |
| Platform | Quiet Systems |
| Series | DKSR-M-2021-09 |
| Status | short |
| Data label | Open-source intelligence // LRRK analytic product |
| Handling | Public-source material. Retrospective monthly. Image rights require separate verification before publication. |

## Executive read

### BLUF

River Loop could not verify that the 2020 GO 4 forced-update path was closed. REQUEST_INSTALL_PACKAGES and a custom update path were still there.

### Key judgments

1. **[Assessment — High confidence]** Blog 2 September 2021. Residual-status note, not a new CVE-class bug.
2. **[Assessment — Moderate confidence]** This contradicts a clean reading of DJI’s 31 July 2020 statement.
3. **[Inference — Moderate confidence]** Phone-side installer remains a live Passport field into 2021.

### Analytic labels

- **Fact** — verified reporting or primary record
- **Assessment** — analytic judgment
- **Inference** — reasoned but not directly observed
- **Uncertainty** — unresolved information gap

### Source grades

- **A1** — authoritative primary record / directly confirmed
- **B1–B2** — generally reliable and corroborated
- **C3** — useful but requires caution

## 01. River Loop: DJI GO 4 custom install path still present

*Event / publication dates: 2 September 2021*

| Field | Value |
| --- | --- |
| Component | software |
| Product | then-current DJI GO 4 Android |
| CVE / advisory | no CVE |
| Patch | disputed / incomplete relative to the 31 July 2020 DJI statement |
| Exploit status | public writeup |
| Taxonomy | CAPEC-186 · ATT&CK ICS T0843 · OWASP IoT I4 · EMB3D TID-211 |

**Verified record — [Fact — A1] https://riverloopsecurity.com/blog/2021/09/dji-go-updates/**

**Exposure.** GCS/app update trust still not store-only.

**Intelligence assessment.** [Assessment — High confidence] Date. [Uncertainty] Not a new defect class — residual of 2020-07.

**Opportunity.** Keep GO 4 installer state on Watch until Play-only is evidenced.

**LRRK relevance.** Control Fabric.

**Confidence.** High on date. Moderate that this is residual, not new.

## Forward indicators

1. Play Store delisting of GO 4 (later coverage, 2021 — not independently re-dated here).

> **Collection integrity.** Follow-up, not a new CVE. Not padded. No exploit steps.

*LRRK — security assurance for systems that sense, move, and act.*

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