2024-8-14 17:55:5 Author: www.tenable.com(查看原文) 阅读量:20 收藏
Ivanti released a patch for a critical severity authentication bypass vulnerability and a warning that exploit code is publicly available
Background
On August 13, Ivanti released a security advisory to address a critical severity authentication bypass vulnerability in its Virtual Traffic Manager (vTM) product, a software-based application delivery controller (ADC).
| CVE | Description | CVSSv3 |
|---|---|---|
| CVE-2024-7593 | Ivanti Virtual Traffic Manager (vTM) Authentication Bypass Vulnerability | 9.8 |
Analysis
CVE-2024-7593 is a critical severity authentication bypass vulnerability. Exploitation of this flaw could allow an unauthenticated, remote attacker to create an administrator user. According to the advisory, access to the management interface of vTM is required in order to exploit this vulnerability.
While Ivanti notes that no known exploitation has been observed for CVE-2024-7593, their advisory makes special note of publicly available exploit code.
Historical exploitation of Ivanti vulnerabilities
Ivanti has had a history of threat actors targeting their products, with one of the most prolific being attacks against their Ivanti Connect Secure (ICS) product, previously known as Pulse Connect Secure and Ivanti Policy Secure. In January, two zero-day vulnerabilities (CVE-2023-46805, CVE-2024-21887) were exploited against ICS in a chained attack. Coincidentally enough, one of these vulnerabilities (CVE-2023-46805) was an authentication bypass flaw. Within a few weeks of this release, Ivanti found several additional vulnerabilities impacting ICS, including another zero-day vulnerability (CVE-2024-21893) that had also been exploited in the wild. CVE-2023-46805 and CVE-2024-21887 were reportedly exploited by a threat actor tracked as UTA0178 and is believed to be a “Chinese nation-state level threat actor.” With threat actors, including nation-state aligned actors actively targeting Ivanti devices, it’s imperative that patching is prioritized.
Hundreds of Internet Facing Instances May Be Affected
Adding to the concern over the potential to exploit this vulnerability, a FOFA search lists more than 400 results tied to over 200 unique IPs that might be affected if patches or mitigations are not applied.
Image source: https://en.fofa.info/
Proof of concept
According to Ivanti’s security advisory, a public proof-of-concept (PoC) is available for this vulnerability. While Tenable Research has not tested and confirmed a working exploit, we are aware of exploit code found on a popular site for public exploit scripts. As attackers are keen to abuse targets with readily available exploit code, immediate patching or application of mitigation steps is recommended.
Solution
Ivanti has released some patches to address this vulnerability, with additional patch versions expected to be released the week of August 19. A summary of the patched versions can be found in the table below:
| Affected Version | Fixed Version | Availability |
|---|---|---|
| 22.2 | 22.2R1 | Available now |
| 22.3 | 22.3R3 | Upcoming- Week of August 19 |
| 22.3R2 | 22.3R3 | Upcoming- Week of August 19 |
| 22.5R1 | 22.5R2 | Upcoming- Week of August 19 |
| 22.6R1 | 22.6R2 | Upcoming- Week of August 19 |
| 22.7R1 | 22.7R2 | Available now |
For organizations that are not able to immediately patch this vulnerability, Ivanti does offer mitigation guidance. As access to the management interface is a requirement for exploitation, limiting access to this interface is recommended. Ivanti recommends to ensure that the management interface is bound to an internal network or private IP address. We recommend referring to Ivanti’s security advisory for the most up to date information on patch availability and mitigation guidance.
Identifying affected systems
A list of Tenable plugins for this vulnerability can be found on the individual CVE page for CVE-2024-7593 as they’re released. This link will display all available plugins for this vulnerability, including upcoming plugins in our Plugins Pipeline.
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Scott Caveza
Scott joined Tenable in 2012 as a Research Engineer on the Nessus Plugins team. Over the years, he has written hundreds of plugins for Nessus, and reviewed code for even more from his time being a team lead and manager of the Plugins team. Previously leading the Security Response team and the Zero Day Research team, Scott is currently a member of the Security Response team, helping the research organization respond to the latest threats. He has over a decade of experience in the industry with previous work in the Security Operations Center (SOC) for a major domain registrar and web hosting provider. Scott is a current CISSP and actively maintains his GIAC GWAPT Web Application Penetration Tester certification.
Interests outside of work: Scott enjoys spending time with his family, camping, fishing and being outdoors. He also enjoys finding ways to break web applications and home renovation projects.
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