As The Australian reports, Victoria police have chosen to cancel 590 fines sent to road users caught by the affected cameras.
Victorian authorities have been forced to withdraw nearly 600 infringements issued from 55 speed and red-light cameras after a maintenance worker inadvertently uploaded a ransomwire virus onto the network using a USB stick on June 6.
A system patch to prevent the virus from spreading further has been applied to the network of cameras.
The cameras, a lot of them in inner-city Melbourne, issued 590 speed and red-light fines during that time.
A virus has been detected, but police say speed cameras haven't been compromised.
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Sources in the police department said there is some confusion regarding the case and that the matter needed to be probed further. The incidents highlight poor patrolling by the police particularly at night in places such as Gurgaon and Gautambudh Nagar.
Victoria's Department of Justice and Regulation said a software virus was mistakenly introduced by a contractor. WannaCry - if that is really the malware that infected the cameras - would not normally be expected to spread via a USB stick.
Victoria Sheriff Brendan Facey confirmed the police had been aware of the infection for a number of days and was working with the camera vendor - called Redflex Traffic Systems - to resolve the issue.
According to local radio station 3AW, the cameras found on highways and intersections-operated by Redflex Traffic Systems-were infected after a maintenance worker inserted a WannaCry-infected USB drive into the devices earlier this month.
Dr Vanessa Teague, a cybersecurity expert from the University of Melbourne, said given the ransomware had only just been detected it was nearly impossible for camera-system operator RedFlex to be fully confident in their technology.
"These cameras are about saving lives; those cameras are still operating".