CVE-2022-0247
📋 TL;DR
This vulnerability in Fuchsia allows local attackers to modify Virtual Memory Object (VMO) data through copy-on-write snapshots, bypassing permission controls. Attackers can alter objects they shouldn't have access to, potentially compromising system integrity. Only Fuchsia systems are affected.
💻 Affected Systems
- Fuchsia OS
📦 What is this software?
Fuchsia by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through privilege escalation, data corruption, or denial of service by modifying critical system objects.
Likely Case
Local privilege escalation allowing attackers to gain unauthorized access to sensitive data or system resources.
If Mitigated
Limited impact with proper access controls and isolation mechanisms in place.
🎯 Exploit Status
Requires local access and knowledge of Fuchsia's VMO system. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit d97c05d2301799ed585620a9c5c739d36e7b5d3d or later
Vendor Advisory: https://fuchsia.googlesource.com/fuchsia/+/d97c05d2301799ed585620a9c5c739d36e7b5d3d
Restart Required: Yes
Instructions:
1. Update Fuchsia to commit d97c05d2301799ed585620a9c5c739d36e7b5d3d or later. 2. Rebuild and redeploy the system. 3. Restart affected services or the entire system.
🔧 Temporary Workarounds
Restrict local user access
allLimit local user accounts and implement strict access controls to reduce attack surface.
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles for all local users.
- Monitor system logs for unusual VMO access patterns or permission violations.
🔍 How to Verify
Check if Vulnerable:
Check Fuchsia version/commit hash. If before d97c05d2301799ed585620a9c5c739d36e7b5d3d, system is vulnerable.Check Version:
fx version or check Fuchsia build informationVerify Fix Applied:
Verify Fuchsia is running commit d97c05d2301799ed585620a9c5c739d36e7b5d3d or later.📡 Detection & Monitoring
Log Indicators:
- Unusual VMO access patterns
- Permission violation logs
- Unexpected copy-on-write operations
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Search for VMO access violations or permission bypass attempts in system logs