CVE-2024-47294
📋 TL;DR
This vulnerability in Huawei's input method framework allows attackers to bypass access permission checks, potentially disrupting system availability. It affects Huawei devices running specific EMUI versions. The impact is limited to availability rather than data compromise.
💻 Affected Systems
- Huawei smartphones and tablets
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
An attacker could cause denial of service by crashing the input method service, making the device temporarily unusable for text input.
Likely Case
Local applications could trigger the vulnerability to disrupt input functionality, requiring a device restart to restore normal operation.
If Mitigated
With proper application sandboxing and least privilege principles, the impact would be limited to the affected application's context.
🎯 Exploit Status
Exploitation requires local application access and knowledge of the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: EMUI 14.0.0.301 and later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2024/10/
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System & updates > Software update. 2. Download and install the latest EMUI update. 3. Restart the device after installation completes.
🔧 Temporary Workarounds
Disable unnecessary input methods
allReduce attack surface by disabling unused input method services
Settings > System & updates > Languages & input > Virtual keyboard > Manage keyboards
Restrict app permissions
allReview and restrict input method permissions for suspicious applications
Settings > Apps > [App Name] > Permissions
🧯 If You Can't Patch
- Monitor for abnormal input method crashes or system instability
- Implement application allowlisting to prevent unauthorized apps from running
🔍 How to Verify
Check if Vulnerable:
Check EMUI version in Settings > About phone > EMUI version. If version is 14.0.0.300 or earlier, device is vulnerable.Check Version:
Settings > About phone > EMUI versionVerify Fix Applied:
Verify EMUI version is 14.0.0.301 or later after applying the update.📡 Detection & Monitoring
Log Indicators:
- InputMethodService crashes
- Permission denial logs related to input framework
Network Indicators:
- No network indicators - this is a local vulnerability
SIEM Query:
No applicable network SIEM query - monitor device logs for input service crashes