CVE-2023-48417
📋 TL;DR
CVE-2023-48417 is a missing permission check vulnerability in KeyChainActivity applications that allows unauthorized access and manipulation of sensitive keychain data. This affects Android-based Chromecast devices, potentially exposing cryptographic keys and credentials to attackers.
💻 Affected Systems
- Google Chromecast with Google TV
- Android TV devices using affected KeyChainActivity components
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of device security, allowing attackers to steal cryptographic keys, impersonate legitimate services, and potentially gain persistent access to connected systems.
Likely Case
Unauthorized access to stored credentials and keys, enabling privilege escalation and data exfiltration from affected Chromecast devices.
If Mitigated
Limited impact with proper network segmentation and access controls, though the vulnerability still exists at the application level.
🎯 Exploit Status
Missing permission checks typically allow straightforward exploitation without authentication requirements.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2023 Android security patch level
Vendor Advisory: https://source.android.com/docs/security/bulletin/chromecast/2023-12-01
Restart Required: Yes
Instructions:
1. Navigate to Settings > System > About > System updates on Chromecast device. 2. Check for and install December 2023 security updates. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Chromecast devices on separate VLANs or network segments to limit attack surface
Disable Unnecessary Features
allTurn off developer options and debugging features that might be accessible through the vulnerability
🧯 If You Can't Patch
- Segment affected devices on isolated networks with strict firewall rules
- Monitor for unusual network traffic or authentication attempts from Chromecast devices
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > System > About > Android security patch level. If date is before December 2023, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level shows December 2023 or later after applying updates.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to KeyChainActivity
- Permission denial logs for keychain operations
- Unexpected process interactions with keychain services
Network Indicators:
- Unusual outbound connections from Chromecast devices
- Traffic to unexpected destinations from TV/streaming devices
SIEM Query:
source="android_logs" AND ("KeyChainActivity" OR "permission denied" OR "keychain") AND severity=HIGH