Cross Site Scripting vulnerability: CVE-2021-30119.Credentials leak and business logic flaw: CVE-2021-30116.With this release, Kaseya has fixed the following vulnerabilities:
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Since the attack, Kaseya has urged on-premise VSA customers to shut down their servers until a patch is ready.Īlmost ten days after the attacks, Kaseya has released the VSA 9.5.7a (9.) update to fix the vulnerabilities used in the REvil ransomware attack. It is unclear which vulnerabilities were used in the attack, but it is believed to be one or a combination of CVE-2021-30116, CVE-2021-30119, and CVE-2021-30120. Unfortunately, the REvil ransomware gang beat Kaseya to the finish line and utilized these vulnerabilities to launch a massive attack on July 2nd against approximately 60 MSPs using on-premise VSA servers and 1,500 business customers. Kaseya had implemented patches for most of the vulnerabilities on their VSA SaaS service but had not completed the patches for the on-premise version of VSA. CVE-2021-30201 - A XML External Entity vulnerability, resolved in May 8th patch.CVE-2021-30121 - A Local File Inclusion vulnerability, resolved in May 8th patch.CVE-2021-30119 - A Cross Site Scripting vulnerability, to be included in 9.5.7.CVE-2021-30118 - A Remote Code Execution vulnerability, resolved in April 10th patch.CVE-2021-30117 - An SQL injection vulnerability, resolved in May 8th patch.CVE-2021-30116 - A credentials leak and business logic flaw, to be included in 9.5.7.In April, the Dutch Institute for Vulnerability Disclosure (DIVD) disclosed seven vulnerabilities to Kaseya: MSPs can deploy VSA on-premise using their servers or utilize Kaseya's cloud-based SaaS solution. Kaseya VSA is a remote management and monitoring solution commonly used by managed service providers to support their customers. Kaseya has released a security update for the VSA zero-day vulnerabilities used by the REvil ransomware gang to attack MSPs and their customers.