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Canadian telecom hacked by suspected China state group (arstechnica.com)

submitted 1 month ago by BrikoX@lemmy.zip to c/cybersecurity@sh.itjust.works

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Maximum-security Cisco vulnerability was patched Oct. 2023 and exploited Feb. 2025.

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[–] Eyekaytee@aussie.zone 7 points 1 month ago* (last edited 1 month ago)

The hackers exploited CVE-2023-20198 to retrieve running configuration files from the devices and modified at least one of the files to create a GRE tunnel allowing traffic collection from the network the devices were connected to.

tbf they've been patched for ages and/or you can just turn the http web interface off, it's 2 lines of config that takes 30 seconds to apply

We were alerted on the day and had a fix rolled out by end of day on hundreds of routers, this is a bit embarrassing for the canadian telcom tbh