Medium · published March 27, 2018
CVSS calls it medium at 5.9. It is confirmed in active exploitation. It sits in the 92.5th percentile for exploit probability.
⚠️ A crafty BGP packet could turn your network into a rollercoaster ride! An attacker can trigger a reload of your device, causing chaos in your routing table. 🔄 Think of this vulnerability like a mischievous prankster playing with the thermostat in a fancy restaurant — if they get it wrong, everyone feels the heat and the dinner service comes to a halt! An attacker can exploit this vulnerability to cause a device reload, leading to a denial of service (DoS) condition. Worst case, they could corrupt the BGP routing table, throwing your entire network into disarray. Imagine the frustration of users unable to access their services while the network is in turmoil!
Think of this vulnerability like a mischievous prankster playing with the thermostat in a fancy restaurant — if they get it wrong, everyone feels the heat and the dinner service comes to a halt! This vulnerability stems from a miscalculation in the IP address length field when processing specific BGP update packets. If a malicious crafted packet is sent after a BGP session has been established, it could lead to device reloads or BGP routing table corruption.
An attacker can exploit this vulnerability to cause a device reload, leading to a denial of service (DoS) condition. Worst case, they could corrupt the BGP routing table, throwing your entire network into disarray. Imagine the frustration of users unable to access their services while the network is in turmoil! To protect against this, ensure you're running Cisco IOS XE Software version 16.3 or higher. If your device isn’t configured for EVPN, it’s not vulnerable, but it's wise to review your configurations just in case. Stay proactive and review your device logs for any unusual BGP messages! You've got this! By updating your software and monitoring your network, you'll be a security hero in no time! 🦸