Cisco switches hit by reboot loops due to DNS client bug

Cisco switches hit by reboot loops due to DNS client bug

Multiple Cisco switch models are suddenly experiencing reboot loops after logging fatal DNS client errors, according to reports seen by BleepingComputer.

Cisco Switches Hit By Reboot Loops Due To DNS Client Bug - Cybernoz - Cybersecurity News

Multiple Cisco switch models are suddenly experiencing reboot loops after logging fatal DNS client errors, according to reports seen by BleepingComputer. Starting at approximately 2 AM, what appears to be a firmware bug in the switches’ internal DNS client service began treating DNS lookup failures as fatal errors, causing affected devices to reboot repeatedly. Switches impacted by the bug are logging fatal errors similar to the following before…