CyberRota Analysis
AI-GeneratedMikroTik RouterOS versions prior to 7.25beta4 are vulnerable to an improper input validation flaw in the BGP routing service, allowing unauthenticated attackers to crash the service by sending malformed UPDATE messages. This can lead to a denial of service, where the BGP session is terminated without notification, disrupting network operations. Network administrators and organizations using affected MikroTik devices should prioritize patching to mitigate this high-severity vulnerability.
Original NVD Description
MikroTik RouterOS before 7.25beta4 contains an improper input validation vulnerability in the labelled-VPN NLRI iterators of the routing service that allows an unauthenticated on-path attacker to crash the BGP service by sending a malformed MP_REACH_NLRI UPDATE message with a prefix-length value below the minimum valid for a labelled-VPN NLRI, which passes validation while describing a route with a negative-length address portion. Attackers can repeatedly send a single BGP UPDATE packet carrying a VPNv4 or VPNv6 NLRI with an out-of-bounds prefix-length to indefinitely hold down the BGP plane, causing session termination without a NOTIFICATION and triggering a service malfunction on the device. The fix is carried only in 7.25beta4, a development build; the current stable release 7.24.2 and the current long-term release 7.23.5 both remain affected.