CVE-2024-27767 Overview
CVE-2024-27767 is an Improper Authentication vulnerability (CWE-287) affecting Unitronics Unilogic software. This authentication bypass vulnerability allows attackers to circumvent security controls without proper credentials, potentially gaining unauthorized access to industrial control systems. The flaw stems from improper implementation of authentication mechanisms in the Unilogic software platform, which is commonly used in programmable logic controller (PLC) environments.
Critical Impact
This authentication bypass vulnerability enables unauthenticated remote attackers to gain full access to Unitronics Unilogic systems, potentially compromising industrial control environments and operational technology infrastructure.
Affected Products
- Unitronics Unilogic (all versions prior to patched release)
Discovery Timeline
- 2024-03-18 - CVE-2024-27767 published to NVD
- 2025-03-10 - Last updated in NVD database
Technical Details for CVE-2024-27767
Vulnerability Analysis
This vulnerability is classified as CWE-287: Improper Authentication, which indicates that the affected Unitronics Unilogic software fails to properly verify user identity before granting access to protected resources. In industrial control system (ICS) environments, such authentication flaws are particularly dangerous as they may allow threat actors to manipulate critical operational processes.
The vulnerability is network-accessible, requiring no privileges or user interaction to exploit. An attacker with network access to the affected Unilogic software can bypass authentication mechanisms and gain unauthorized access with potential to compromise confidentiality, integrity, and availability of the system.
Root Cause
The root cause of CVE-2024-27767 lies in improper authentication implementation within Unitronics Unilogic software. The system fails to adequately verify that an entity is who or what it claims to be before granting access to protected functionality. This may include missing authentication checks, weak credential validation, or flawed session management that allows authentication to be circumvented entirely.
Attack Vector
The attack vector for this vulnerability is network-based. An unauthenticated remote attacker can exploit this flaw by sending specially crafted requests to the Unitronics Unilogic software interface. Since the vulnerability requires no privileges, no user interaction, and has low attack complexity, exploitation can be achieved through:
- Direct network access to the Unilogic application interface
- Sending requests that bypass authentication checks
- Gaining unauthorized access to PLC programming and control functions
The authentication bypass mechanism allows attackers to interact with the system as if they were authenticated users, potentially enabling modification of PLC programming, access to sensitive operational data, or disruption of industrial processes.
Detection Methods for CVE-2024-27767
Indicators of Compromise
- Unexpected or unauthorized connections to Unitronics Unilogic interfaces from external IP addresses
- Authentication log entries showing successful access without corresponding valid credential usage
- Unusual configuration changes to PLC programming or operational parameters
- Network traffic to Unilogic services from previously unseen sources
Detection Strategies
- Deploy network monitoring to identify unauthorized access attempts to Unitronics Unilogic services
- Implement ICS-specific intrusion detection systems (IDS) with rules for anomalous authentication patterns
- Enable comprehensive logging on all Unilogic systems and forward logs to a centralized SIEM
- Monitor for configuration changes to PLCs that were not authorized through change management processes
Monitoring Recommendations
- Establish baseline network traffic patterns for Unilogic communications and alert on deviations
- Configure alerts for any authentication events that occur outside normal operational hours
- Implement network segmentation monitoring to detect lateral movement attempts from compromised Unilogic systems
- Review access logs regularly for authentication anomalies or unexpected session patterns
How to Mitigate CVE-2024-27767
Immediate Actions Required
- Isolate affected Unitronics Unilogic systems from untrusted networks immediately
- Implement network segmentation to restrict access to ICS/SCADA environments
- Apply vendor-provided patches or updates as soon as they become available
- Enable multi-factor authentication where supported and implement additional access controls
- Conduct a security audit of all Unilogic deployments to identify potentially compromised systems
Patch Information
Organizations should consult the Israeli Government CVE Advisories for official patch and remediation guidance from Unitronics. Contact Unitronics directly for the latest security updates and firmware versions that address this authentication bypass vulnerability.
Workarounds
- Place all Unitronics Unilogic systems behind a properly configured firewall and restrict network access to authorized IP addresses only
- Implement VPN requirements for any remote access to ICS/SCADA networks containing Unilogic systems
- Deploy application-layer gateways or reverse proxies with additional authentication requirements in front of Unilogic interfaces
- Consider implementing network-based access control lists (ACLs) to limit which hosts can communicate with Unilogic systems
# Example firewall rule to restrict Unilogic access (adjust ports as needed)
# Only allow access from trusted management network
iptables -A INPUT -p tcp --dport 22 -s 10.0.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP
# Enable logging for connection attempts
iptables -A INPUT -p tcp --dport 22 -j LOG --log-prefix "Unilogic Access Attempt: "
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
