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Executive Summary
On December 10, 2024, Ivanti disclosed a maximum-severity authentication bypass vulnerability in its Cloud Services Appliance (CSA), tracked as CVE-2024-11639. This vulnerability allows remote attackers to gain administrative privileges on vulnerable appliances running Ivanti CSA 5.0.2 or earlier without requiring authentication or user interaction. The flaw enables attackers to circumvent authentication through an alternate path or channel, posing a significant risk to affected systems. Organizations are urged to upgrade to CSA 5.0.3 to mitigate this risk.
Technical Information
The CVE-2024-11639 vulnerability is characterized by its ability to allow unauthorized access to the Ivanti CSA. This vulnerability is particularly concerning as it does not require any form of authentication, making it easier for attackers to exploit. The flaw was reported by CrowdStrike's Advanced Research Team, which highlights the importance of proactive security measures in the face of such vulnerabilities.
The vulnerability is classified as a maximum severity issue, indicating that it poses a critical risk to organizations utilizing the affected versions of Ivanti CSA. The potential for exploitation is significant, as attackers could leverage this vulnerability to gain administrative control over the appliance, leading to unauthorized access to sensitive data and systems.
Ivanti has stated, "We are not aware of any customers being exploited by these vulnerabilities prior to public disclosure," which suggests that while the vulnerability is severe, there is currently no evidence of active exploitation. However, the cybersecurity landscape is dynamic, and organizations must remain vigilant.
Exploitation in the Wild
While there have been no confirmed instances of active exploitation of CVE-2024-11639, the history of vulnerabilities affecting Ivanti products raises concerns. Previous vulnerabilities, such as CVE-2024-8190 (remote code execution) and CVE-2024-8963 (admin authentication bypass), were disclosed in September 2024 and were reportedly being targeted in attacks. This trend underscores the necessity for organizations to take immediate action to secure their systems against potential threats.
The CVE-2024-11639 vulnerability is the sixth security vulnerability patched in recent months for the Ivanti CSA, following a series of critical vulnerabilities that have raised alarms within the cybersecurity community. Organizations should be aware that the absence of confirmed exploitation does not equate to safety; rather, it highlights the need for proactive measures to prevent potential attacks.
APT Groups using this vulnerability
Currently, there is no specific Advanced Persistent Threat (APT) group publicly associated with the exploitation of the CVE-2024-11639 vulnerability. However, given the nature of the vulnerability, it is crucial for organizations to remain vigilant as the potential for exploitation exists. The lack of attribution does not diminish the risk; organizations must be prepared for the possibility of future attacks leveraging this vulnerability.
Affected Product Versions
The CVE-2024-11639 vulnerability affects the following versions of Ivanti Cloud Services Appliance (CSA): Ivanti CSA 5.0.2 and earlier versions. Organizations using these versions are strongly advised to upgrade to CSA 5.0.3 or later to mitigate the risk associated with this vulnerability. The upgrade is essential to ensure that systems are protected against potential exploitation.
Indicators of Compromise (IOCs)
As of now, there are no specific indicators of compromise (IOCs) publicly available for CVE-2024-11639. Ivanti has not reported any known exploitation that could provide a list of IOCs. Organizations are encouraged to monitor their systems for unusual activity and apply the necessary patches as soon as possible. Vigilance in monitoring system logs and access attempts is critical in identifying any unauthorized access.
Workaround and Mitigation
To mitigate the risk associated with CVE-2024-11639, organizations should take the following actions:
Organizations should upgrade all vulnerable Ivanti CSA appliances to version 5.0.3 or later, as recommended by Ivanti. Conducting a thorough review of system logs and access controls to identify any unauthorized access attempts is essential. Implementing network segmentation can limit the exposure of critical systems to potential attackers. Regularly reviewing and updating security policies and procedures to ensure they align with best practices is also crucial.
References
- Ivanti Security Advisory: https://www.bleepingcomputer.com/news/security/ivanti-warns-of-maximum-severity-csa-auth-bypass-vulnerability/
- NVD Entry for CVE-2024-11639: https://nvd.nist.gov/vuln/detail/CVE-2024-11639
- CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Rescana is here for you
At Rescana, we are committed to helping our customers navigate the complexities of cybersecurity through our Continuous Threat and Exposure Management (CTEM) platform. Our solutions are designed to provide organizations with the tools and insights necessary to manage their security posture effectively. We are happy to answer any questions you might have about this report or any other issue at ops at rescana.com.
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