Synopsis
A denial-of-service vulnerability exists in CyberPower PowerPanel Business (PPB) 4.11.0.
An unauthenticated remote attacker can restart the ppbd.exe process via the PowerPanel Business Service Watchdog service listening on TCP port 2003. The attacker can repeatedly restart ppbd.exe to render it unavailable.
PoC:
// restart PPB Management
echo '{"requestType":2,"requestString": "{\"module\":2,\"needRestart\":true}"}' | nc <target-host> 2003
Solution
Upgrade to PPB 4.11.3 or later.
Additional References
https://www.cyberpower.com/global/en/product/sku/powerpanel_business_for_windows#downloadsDisclosure Timeline
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