Source: cve@mitre.org
Vulnerability in restore0.9 installation script in NeXT 1.0a and 1.0 allows local users to gain root privileges.
Critical vulnerability in the NeXTSTEP operating system allows local users to escalate privileges to root. Exploiting the restore0.9 installation script grants attackers complete control over the system, potentially leading to data breaches and system compromise.
Step 1: Local Access: The attacker must first have local access to the NeXTSTEP system, typically through a compromised account or physical access.
Step 2: Triggering the Vulnerability: The attacker interacts with the restore0.9 script, potentially by attempting to restore a specially crafted archive or manipulating the script's input parameters.
Step 3: Exploitation: The attacker leverages the vulnerability in the script to overwrite critical system files (e.g., /etc/passwd, /etc/shadow) or execute arbitrary commands with root privileges.
Step 4: Privilege Escalation: The attacker gains root access, allowing them to control the entire system.
The vulnerability stems from a flaw in the restore0.9 installation script within NeXTSTEP 1.0a and 1.0. The script likely mishandles file permissions or input validation during the restoration process, allowing a local user to overwrite critical system files or execute arbitrary code with root privileges. This could involve a race condition where the attacker can manipulate the timing of file operations or a privilege escalation issue where the script doesn't properly check user permissions before executing commands. The root cause is likely a combination of insecure file handling and a lack of proper input sanitization, leading to a local privilege escalation.
Due to the age of the vulnerability, it's unlikely to be directly associated with specific APT groups or modern malware. However, any attacker with local access could leverage this vulnerability. This vulnerability is not listed in the CISA KEV catalog.
Monitor system logs for unusual activity related to the restore0.9 script.
Analyze file system changes, specifically modifications to critical system files like /etc/passwd and /etc/shadow.
Look for suspicious network connections originating from the compromised system after the potential exploitation.
Isolate or decommission affected NeXTSTEP systems.
If the system is critical and cannot be immediately removed, apply the vendor's recommended patch or workaround (if available).
Implement strong access controls and user authentication to prevent unauthorized local access.
Regularly audit system logs for suspicious activity.