Optus Breach Sept 2022: Drivers Licence Western Australia and DoT WA

Optus (part of Singtel) was breached due to poor development practices in September 2022.

UPDATE 28/Sept/2022: The Premier has announced that new drivers licences will be available, with new IDs. 

It appears the team implementing their APIs did not have the skills to apply authentication, firewalling, rate limiting, alerting, and/or simulated data in non-production environments. It appears the management for this team did not know or enforce these protections either. And it appears the upper management did not check that lower management was taking necessary precautions and standards when handling PII.

There’s going to be some implications for this. Perhaps better engineering will be one of them.

I’m in the breach data as an Optus customer, and after a few days of news items, I received a confirmation email from Optus.

I’ve seen that in NSW, the digital-savvy minister Victor Dominello is already discussing re-issuing drivers licences in NSW. I thought I’d call the Western Australian Department of Transport and see what they are doing.

It’s been a public holiday Monday this week, so on Tuesday after 55 minutes in a queue, I got through to someone at DoT. Of course, to authenticate me on the phone they asked for the same information as shown in the data breach.

I learned:

  • DoT WA are not re-issuing licences at this stage
  • the ID number o the licence cannot currently be changed – it is perpetual
  • if they were to re-issue them with the same ID but a new expiry date, it would be on the same day and month, but 5 years later, so for any attacker trying a combination, the correct expiry date is the one in the breach, plus one, two, three for our five years.

The WA Department of Transport needs to look at this issue and fix a few items: The ID number issued to the public should be temporary and rotating for every issuance. I suspect there’s a few databases with this public number as a primary key. Perhaps the expiry date will need to be investigated to have 5 years +/- 30 days or so, and every re-issue should include the same variance. Indeed, perhaps reduce the lifetime from 5 years to two years to force rotation of the ID number, or let customers pay for the number of days they would like pro-rata, from 180 to 3650.

I know a few people at the Department, and I know they’re going to get a lot of focus from this issue. They’re welcome to reach out and chat with me; they have my details, after all. I know its a busy week for my contacts, so for anyone else out there, let’s stand back and wait.

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