Ivanti urges customer to patch yet another critical vulnerability

In a new blog post, Ivanti says that it has found another vulnerability and urges customers to “immediately take action to ensure you are fully protected”.

This vulnerability only affects a limited number of supported versions–Ivanti Connect Secure (version 9.1R14.4, 9.1R17.2, 9.1R18.3, 22.4R2.2 and 22.5R1.1), Ivanti Policy Secure version 22.5R1.1 and ZTA version 22.6R1.3.

Please read between the lines that there could be unsupported versions which will never see a patch for this vulnerability.

A patch is available now for Ivanti Connect Secure (versions 9.1R14.5, 9.1R17.3, 9.1R18.4, 22.4R2.3, 22.5R1.2, 22.5R2.3 and 22.6R2.2), Ivanti Policy Secure (versions 9.1R17.3, 9.1R18.4 and 22.5R1.2) and ZTA gateways (versions 22.5R1.6, 22.6R1.5 and 22.6R1.7).

Customers can access the patch via the standard download portal (login required). The instructions are somewhat complicated, to say the least. Due to all the different versions that are available, it is imperative to carefully read the instructions.

Customers can read this KB article for detailed instructions on how to apply the mitigation and apply the patch as each version becomes available. Please ensure you are following the KB article to receive updates. If you have questions or require further support, please log a case and/or request a call in the Success Portal.

Important to note:

Customers who applied the patch released on January 31 or February 1, and completed a factory reset of their appliance, do not need to factory reset their appliances again. And once customers applied this newly released patch, they do not need to apply the mitigation or the patches released on January 31 and February 1. 

The vulnerability

The vulnerability, listed as CVE-2024-22024 with a CVSS score of 8.3 out of 10, allows an attacker to access certain restricted resources without authentication.

An XML external entity injection (XXE) is a web security vulnerability that allows an attacker to interfere with an application’s processing of XML data. It often allows an attacker to view files on the application server filesystem, and/or to interact with any back-end or external systems that the application itself can access.

Ivanti found the XXE vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x), Ivanti Policy Secure (9.x, 22.x) and ZTA gateways.

Since Ivanti claims that the vulnerability came up during internal code reviews, it is unlikely that an exploit already exists, but this type of vulnerability is usually easy to exploit, so chances are, this will not take long.

Although we have seen a pretty convincing claim that they did not find it themselves:

According to Ivanti they are unaware of any evidence of customers being exploited by CVE-2024-22024.

Only a week ago all, FCEB agencies received intructions to disconnect vulnerable Ivanti products before the weekend. This because besides the Ivanti vulnerabilities actively exploited in massive numbers we wrote about on January 11, 2024, alerts went off about two new high severity flaws on January 31, 2024.

All in all, since January 10, five vulnerabilities have been reported in Ivanti products. And at least three of them are subject to active exploitation.

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