Hey there, tech enthusiasts! Big news from Cisco – a serious denial of service (DoS) flaw has been discovered in the Cisco NX-OS software that powers their Nexus devices. But fret not, Cisco has already released a patch for this vulnerability and is urging all users to update their software.
What Happened?
Cisco recently tackled a high-severity DoS security flaw that was affecting their NX-OS software, the operating system used in their Nexus data center switches.
According to Cisco’s advisory, the vulnerability was related to the DHCPv6 relay agent in the NX-OS Software, identified as CVE-2024-20446. This flaw could allow remote attackers to trigger a DoS attack on the target device by sending malicious DHCPv6 packets without authentication.
Cisco explained that this flaw could crash and restart the dhcp_snoop process multiple times, leading to the device reloading and ultimately causing a DoS condition.
The affected devices include Nexus 3000 and 7000 Series Switches and Nexus 9000 Series Switches running specific versions of NX-OS Software with the DHCPv6 relay agent enabled.
How Can You Stay Protected?
Cisco has advised users to update their devices to the latest NX-OS release to receive the fix for this vulnerability. If you can’t update immediately, you can temporarily disable the DHCPv6 relay agent using the no ipv6 dhcp relay command in the device CLI.
Don’t take any chances with your network security – make sure you’re running the latest software updates from Cisco to stay protected against potential threats.
