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CVE-2025-5462: Unauthenticated Denial of Service Vulnerability in Ivanti Products

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Overview

A critical vulnerability identified as CVE-2025-5462 has been discovered in multiple Ivanti products, including Connect Secure, Policy Secure, ZTA Gateway, and Neurons for Secure Access. The vulnerability allows unauthenticated remote attackers to trigger a denial of service through a heap-based buffer overflow exploit. Given the severity of this vulnerability, it is essential for users of the affected products to take immediate steps to mitigate the risks involved.

Vulnerability Summary

CVE ID: CVE-2025-5462
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of Service, Potential system compromise, and data leakage

Affected Products

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Product | Affected Versions

Ivanti Connect Secure | Before 22.7R2.8, 22.8R2
Ivanti Policy Secure | Before 22.7R1.5
Ivanti ZTA Gateway | Before 22.8R2.3-723
Ivanti Neurons for Secure Access | Before 22.8R1.4

How the Exploit Works

The vulnerability occurs due to insufficient boundary checks when handling network packets in the affected Ivanti products. An unauthenticated attacker can send specially crafted packets to the affected service, causing a buffer overflow in the heap memory. This can result in a denial of service, and potentially, data leakage or system compromise.

Conceptual Example Code

Below is a conceptual example of a malicious payload that could be used to exploit this vulnerability:

POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/octet-stream
{ "payload": "<BUFFER OVERFLOW EXPLOIT>" }

Note that the payload above is conceptual and not a working exploit. It illustrates the method an attacker might use to trigger the vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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