While conducting security research, I identified a critical vulnerability in Kemp’s LoadMaster Load Balancer. This vulnerability is a Command Injection and allows full system compromise. It requires no authentication and can be exploited remotely by having access to the Web User Interface (WUI). Kemp found that all LoadMaster versions up to and including version 7.2.60.0 and also the multi-tenant hypervisors up to and including version 7.1.35.11 are affected.
Kemp LoadMaster is a widely used Load Balancing Application that can commonly be seen in customer engagements. Therefore, we decided to take a closer look as part of our regular research projects.
As promised in the Announcement: Progress / Kemp LoadMaster CVE-2024-7591, I will go into detail about how I identified the vulnerability, where the vulnerable part of the code is, how the vulnerability can be exploited, and finally, how the vendor fixed this vulnerability.
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