Description
Kaseya Virtual System Administrator (VSA) 7.x before 7.0.0.33, 8.x before 8.0.0.23, 9.0 before 9.0.0.19, and 9.1 before 9.1.0.9 does not properly require authentication, which allows remote attackers to bypass authentication and (1) add an administrative account via crafted request to LocalAuth/setAccount.aspx or (2) write to and execute arbitrary files via a full pathname in the PathData parameter to ConfigTab/uploader.aspx.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 2 modules
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Kaseya VSA uploader.aspx Arbitrary File Upload
exploit/windows/http/kaseya_uploader
-
Kaseya VSA Master Administrator Account Creation
auxiliary/admin/http/kaseya_master_admin
Exploit-DB 2
- Kaseya Virtual System Administrator (VSA) - 'uploader.aspx' Arbitrary File Upload (Metasploit) EDB-38401 · remote · Oct 5, 2015 · verified
- Kaseya Virtual System Administrator (VSA) - Multiple Vulnerabilities (2) EDB-38351 · webapps · Sep 29, 2015 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://www.zerodayinitiative.com/advisories/ZDI-15-448
- http://packetstormsecurity.com/files/133782/Kaseya-Virtual-System-Administrator-Code-Execution-Privilege-Escalation.html
- http://www.zerodayinitiative.com/advisories/ZDI-15-449
- https://www.exploit-db.com/exploits/38351/
- https://helpdesk.kaseya.com/entries/96164487--Kaseya-Security-Advisory