CVE-2022-1242
📋 TL;DR
CVE-2022-1242 is a vulnerability in Apport, Ubuntu's crash reporting tool, that allows local attackers to trick Apport into connecting to arbitrary sockets as the root user. This affects Ubuntu systems with Apport enabled, potentially allowing privilege escalation or unauthorized access to network services. The vulnerability requires local access to exploit.
💻 Affected Systems
- Apport
📦 What is this software?
Apport by Canonical
Ubuntu Linux by Canonical
Ubuntu Linux by Canonical
Ubuntu Linux by Canonical
Ubuntu Linux by Canonical
⚠️ Risk & Real-World Impact
Worst Case
Full root privilege escalation leading to complete system compromise, installation of persistent backdoors, or lateral movement to other systems.
Likely Case
Local privilege escalation allowing attackers to gain root access on compromised Ubuntu systems.
If Mitigated
Limited impact if Apport is disabled or properly configured with restricted permissions.
🎯 Exploit Status
Exploitation requires local access to the system. The vulnerability is in how Apport handles socket connections when running as root.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apport 2.20.11-0ubuntu82.1 or later
Vendor Advisory: https://ubuntu.com/security/notices/USN-5427-1
Restart Required: No
Instructions:
1. Update system: sudo apt update && sudo apt upgrade
2. Specifically update Apport: sudo apt install --only-upgrade apport
3. Verify version: apport --version
🔧 Temporary Workarounds
Disable Apport
linuxCompletely disable the Apport crash reporting service
sudo systemctl stop apport
sudo systemctl disable apport
sudo sed -i 's/enabled=1/enabled=0/' /etc/default/apport
Restrict Apport permissions
linuxLimit Apport's ability to execute with elevated privileges
sudo chmod 644 /usr/share/apport/apport
sudo chown root:root /usr/share/apport/apport
🧯 If You Can't Patch
- Disable Apport service completely using the workaround commands
- Implement strict access controls to prevent local users from exploiting the vulnerability
🔍 How to Verify
Check if Vulnerable:
Check Apport version: dpkg -l | grep apport | grep ^iiCheck Version:
apport --versionVerify Fix Applied:
Verify Apport version is 2.20.11-0ubuntu82.1 or later: apport --version📡 Detection & Monitoring
Log Indicators:
- Unusual Apport processes running as root
- Apport connecting to unexpected sockets or ports
- Failed privilege escalation attempts in system logs
Network Indicators:
- Apport making unexpected network connections
- Root processes connecting to unusual ports
SIEM Query:
process_name:"apport" AND user:"root" AND (destination_port:!* OR unusual_connection_pattern)