CVE-2025-0283: Stack-Based Buffer Overflow in Ivanti VPN

What is CVE-2025-0283?

CVE-2025-0283 is a stack-based buffer overflow vulnerability affecting Ivanti Connect Secure, Policy Secure, and Neurons for ZTA gateways. The flaw allows local authenticated attackers to escalate their privileges on affected systems. The vulnerability arises due to improper handling of memory operations, leading to a buffer overflow condition. ​

Quick Facts

• CVE ID: CVE-2025-0283
• Severity: High
• CVSS Score: 7.0
• Attack Vector: Local
• Privileges Required: Low
• User Interaction: Required
• Impact: Privilege Escalation​

Who Should Be Concerned?

Organizations utilizing the following Ivanti products and versions are at risk:​

• Ivanti Connect Secure versions prior to 22.7R2.5
• Ivanti Policy Secure versions prior to 22.7R1.2
• Ivanti Neurons for ZTA gateways versions prior to 22.7R2.3​

Given the potential for privilege escalation, immediate attention is required. ​

Exploitation Details

Exploitation of CVE-2025-0283 involves a local authenticated attacker sending specially crafted requests to the vulnerable Ivanti devices, triggering the buffer overflow and allowing escalation of privileges. This could lead to unauthorized access to sensitive data and further compromise of the system.

Potential Impact

Successful exploitation can lead to:​

• Escalation of privileges
• Unauthorized access to sensitive data
• Disruption of critical services​

The vulnerability has a CVSS score of 7.0, indicating its high severity.

Vulnerability Timeline

• Discovery Date: December 2024
• Public Disclosure: January 8, 2025
• Patch Release: January 2025

Proof of Concept (PoC)

A proof-of-concept exploit for CVE-2025-0283 has been released publicly. The PoC demonstrates how attackers can achieve privilege escalation by exploiting the buffer overflow vulnerability.

Disclaimer: The following code is for educational and defensive purposes only.

bash

python3 CVE-2025-0283.py -t <TARGET_IP> -p 443

This script targets vulnerable Ivanti Connect Secure instances and, upon successful exploitation, can escalate privileges on the affected device.​

Mitigation Strategies

• Apply Security Updates: Ivanti has released patches addressing this vulnerability. Ensure all systems are updated to the latest versions.
• Utilize Integrity Checker Tool (ICT): Run Ivanti’s ICT to detect signs of compromise.
• Monitor Systems: Continuously monitor for unusual activities and indicators of compromise.
• Restrict Access: Implement network segmentation and access controls to limit exposure.​

For detailed mitigation instructions, refer to Ivanti’s guidance. ​

Conclusion

CVE-2025-0283 poses a significant threat due to its potential for privilege escalation. Organizations must act swiftly to patch affected systems, monitor for signs of exploitation, and implement robust security measures to mitigate the risk.​

Frequently Asked Questions (FAQs)