CVE-2024-27879

7.5 HIGH

📋 TL;DR

This CVE describes a memory corruption vulnerability in Apple iOS/iPadOS due to insufficient bounds checking. An attacker can cause unexpected app termination (denial of service) by exploiting this flaw. All users running affected iOS/iPadOS versions are vulnerable.

💻 Affected Systems

Products:
  • iOS
  • iPadOS
Versions: Versions before iOS 17.7, iPadOS 17.7, iOS 18, and iPadOS 18
Operating Systems: iOS, iPadOS
Default Config Vulnerable: ⚠️ Yes
Notes: All devices running affected iOS/iPadOS versions are vulnerable by default.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Potential for arbitrary code execution leading to full device compromise, though the CVE description only mentions app termination.

🟠

Likely Case

Denial of service through app crashes, potentially disrupting device functionality.

🟢

If Mitigated

Minimal impact with proper patching; app termination attempts would fail against patched systems.

🌐 Internet-Facing: MEDIUM - Requires user interaction (opening malicious content) but could be delivered via web or messages.
🏢 Internal Only: LOW - Primarily affects mobile devices rather than internal infrastructure.

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ⚠️ Yes
Complexity: MEDIUM

Exploitation likely requires user interaction (opening malicious content). No public exploit code identified in references.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: iOS 17.7, iPadOS 17.7, iOS 18, iPadOS 18

Vendor Advisory: https://support.apple.com/en-us/121246

Restart Required: Yes

Instructions:

1. Open Settings app. 2. Tap General. 3. Tap Software Update. 4. Install available update. 5. Restart device when prompted.

🔧 Temporary Workarounds

No effective workarounds

all

This is a core OS vulnerability requiring patching.

🧯 If You Can't Patch

  • Restrict device usage to trusted applications only
  • Implement mobile device management (MDM) to control app installations

🔍 How to Verify

Check if Vulnerable:

Check iOS/iPadOS version in Settings > General > About > Version

Check Version:

Not applicable - check via device settings UI

Verify Fix Applied:

Verify version is iOS 17.7/iPadOS 17.7 or later

📡 Detection & Monitoring

Log Indicators:

  • Multiple app crashes in system logs
  • Unexpected process terminations

Network Indicators:

  • Unusual network traffic patterns preceding crashes

SIEM Query:

Not applicable for typical mobile device deployments

🔗 References

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