Cisco has disclosed a bug in the IPv6 packet processing engine of several Cisco Small Business Smart and Managed Switches that could allow a remote attacker without credentials to trigger a denial of service on affected devices.
Affected switches include 250 Series Smart Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, Small Business 200 Series Smart Switches, Small Business 300 Series Managed Switches, and Small Business 500 Series Stackable Managed Switches.
While the bug leaves all named switches vulnerable to being rebooted and knocked offline, only four of them have software updates available because some are beyond the end-of-software-maintenance milestone. The switches with an update available include 250 Series Smart Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, and computer science and engineering Series Stackable Managed Switches.
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