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April 11, 2025
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How to Fix CVE-2025-22467: A Critical Stack-Based Buffer Overflow Vulnerability in Ivanti Connect Secure?
Ivanti Connect Secure is facing a severe security vulnerability, tracked as CVE-2025-22467, a stack-based buffer overflow that allows remote authenticated attackers to execute arbitrary code on the system. Given the critical nature of this flaw, organizations using affected versions must take immediate steps to mitigate the risk.
This article aims to provide security professionals with a comprehensive guide on understanding and remediating CVE-2025-22467. It covers the vulnerability's summary, impact, affected products, and most importantly, the steps to fix or mitigate it. This information is crucial for security professionals in DevSecOps, application security, product security, vulnerability management, penetration testing, and security operations roles.
A Short Introduction to Ivanti Connect Secure
Ivanti Connect Secure (formerly Pulse Connect Secure) is a widely used VPN solution that provides secure access to corporate resources for remote users. It offers a range of features including SSL VPN, application-level access control, and endpoint security compliance. Because of its role in providing secure remote access, the appliance is a critical component of network infrastructure and securing it is of paramount importance.
Summary of CVE-2025-22467
CVE ID: CVE-2025-22467
Description: A stack-based buffer overflow vulnerability in Ivanti Connect Secure allows remote authenticated attackers to execute arbitrary code.
CVSS Score: 9.9 (Critical)
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVE-2025-22467 is a critical stack-based buffer overflow vulnerability found in Ivanti Connect Secure versions prior to 22.7R2.6. The vulnerability arises from insufficient bounds checking when handling user-supplied input, specifically when processing data on the stack. An authenticated attacker can exploit this flaw by sending a specially crafted request, leading to a buffer overflow that overwrites adjacent memory regions on the stack. This can then be leveraged to execute arbitrary code with elevated privileges, potentially leading to complete system compromise.
Impact of CVE-2025-22467
The impact of CVE-2025-22467 is extremely severe due to its high CVSS score (9.9/10) and the potential for remote code execution. Successfully exploiting this vulnerability can have devastating consequences for organizations relying on Ivanti Connect Secure:
Compromised System Confidentiality: Attackers can gain unauthorized access to sensitive data stored on the appliance, including configuration files, user credentials, and internal network information.
Data Modification or Destruction: Malicious actors can modify critical system files, disrupt services, or even wipe data, leading to significant operational disruptions.
Complete System Takeover: Remote code execution allows attackers to gain full control over the affected Ivanti Connect Secure appliance, enabling them to use it as a pivot point to compromise other internal network resources.
Lateral Movement: Attackers can leverage the compromised appliance to move laterally within the network, targeting other systems and escalating their access to critical assets.
Products Affected by CVE-2025-22467
The following products and versions are affected by this vulnerability:
| Product | Affected Versions |
|---|---|
| Ivanti Connect Secure | Versions before 22.7R2.6 |
It's crucial to note that only Ivanti Connect Secure versions before 22.7R2.6 are vulnerable. Upgrading to version 22.7R2.6 or later will remediate the vulnerability.
How to Check If Your Product Is Vulnerable?
To determine if your Ivanti Connect Secure appliance is vulnerable, follow these steps:
Log in to the Ivanti Connect Secure administrative interface.
Navigate to the "System" or "About" section. The exact location may vary slightly depending on your version.
Identify the installed version number.
Compare the version number against the affected versions listed above. If your appliance is running a version prior to 22.7R2.6, it is vulnerable and requires immediate attention.
How to Fix CVE-2025-22467?
The primary remediation strategy to address CVE-2025-22467 is to upgrade your Ivanti Connect Secure appliance to version 22.7R2.6 or later.
Upgrade Ivanti Connect Secure: Download the latest version (22.7R2.6 or later) from the Ivanti support portal and follow the official upgrade instructions.
In addition to upgrading, consider implementing these mitigation measures:
Network Segmentation: Implement strict network segmentation to limit the potential impact of a compromised appliance.
Limit and Monitor Administrative Access: Restrict administrative access to the Ivanti Connect Secure appliance to only authorized personnel and closely monitor all administrative activity.
Enhanced Logging and Monitoring: Enable enhanced logging and monitoring on the appliance to detect potential exploitation attempts.
Security Assessment: Conduct a thorough security assessment of your environment to identify any signs of prior compromise.
Verify no signs of prior compromise: Check logs for indicators of compromise (IOCs) associated with known attacks targeting Ivanti Connect Secure.
By taking these steps, security professionals can effectively remediate CVE-2025-22467 and protect their organizations from potential attacks.
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Arun KL
Arun KL is a cybersecurity professional with 15+ years of experience in IT infrastructure, cloud security, vulnerability management, Penetration Testing, security operations, and incident response. He is adept at designing and implementing robust security solutions to safeguard systems and data. Arun holds multiple industry certifications including CCNA, CCNA Security, RHCE, CEH, and AWS Security.
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