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39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
# Apple iOS Activation Flaw
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## Summary
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A **critical vulnerability** in Apple’s iOS activation backend allows injection of unauthenticated XML `.plist` payloads during the device setup phase.
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The flaw permits arbitrary provisioning changes without authentication, signature verification, or error feedback — exposing devices to **pre-activation tampering** and **persistent configuration manipulation**.
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---
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## Affected Product
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- **Vendor:** Apple
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- **Product:** iOS Activation Infrastructure
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- **Endpoint:** `https://humb.apple.com/humbug/baa` (Apple internal)
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---
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## Core Issue
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- The server at `https://humb.apple.com/humbug/baa` accepts unauthenticated XML payloads.
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- This enables **silent provisioning changes** during activation.
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- **Impacts include:**
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- Modem configuration
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- CloudKit token behavior
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- Carrier-level protocol enforcement
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⚠️ No jailbreak, malware, or user interaction required.
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---
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## Implications
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- **Supply chain compromise potential**
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- **Bypasses enterprise MDM and hardening policies**
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- **Persistent, pre-user compromise vector** during the trusted setup phase
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---
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**Disclosure Timeline**
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- 05/19/2025 reported to Apple & US Cert (tracking ID VRF#25-05-RCKYK)
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- Vendor unresponsive as of 09/23/2025
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