CVE-2024-1622 in Routinator
Summary
by MITRE • 02/26/2024
Due to a mistake in error checking, Routinator will terminate when an incoming RTR connection is reset by the peer too quickly after opening.
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Analysis
by VulDB Data Team • 02/27/2025
The vulnerability identified as CVE-2024-1622 affects Routinator, a critical component in the Internet routing infrastructure that validates Resource Public Key Infrastructure (RPKI) data. This flaw resides in the error handling mechanism of the RTR (Routinator Transfer Protocol) implementation, which is essential for maintaining the integrity of Internet routing information. The issue manifests when Routinator encounters rapid connection resets from peer servers, specifically during the initial connection establishment phase.
The technical root cause involves inadequate error checking procedures within Routinator's RTR protocol implementation. When a peer server resets the connection immediately after initiating an RTR session, the software fails to properly handle this exceptional condition and subsequently terminates its own process. This behavior represents a classic denial of service vulnerability where legitimate network operations can trigger application crashes through improper state management. The flaw demonstrates poor defensive programming practices that fail to account for the full spectrum of network communication behaviors that may occur in production environments.
The operational impact of this vulnerability extends beyond simple service disruption as Routinator serves as a fundamental building block for RPKI validation across Internet infrastructure. When the software terminates due to rapid connection resets, it can affect the entire validation process for routing information, potentially leading to routing instability or security gaps in the Internet backbone. Network operators relying on Routinator for RPKI validation may experience intermittent service outages, which could compromise the reliability of BGP route filtering and increase the risk of route hijacking or prefix announcements from unauthorized sources.
This vulnerability aligns with CWE-400, which categorizes "Uncontrolled Resource Consumption" and represents a denial of service condition that can be triggered by manipulating network connection patterns. The flaw also intersects with ATT&CK technique T1499.004, "Endpoint Denial of Service," as it enables an attacker to cause service unavailability through network-level manipulation. The issue particularly affects systems where Routinator operates in high-traffic environments or where network connectivity to RTR peers may be unstable, making it more prevalent in production networks.
Mitigation strategies should prioritize updating Routinator to versions that address the error handling deficiency, which typically involves implementing proper connection state management and ensuring graceful degradation rather than process termination. Network administrators should also consider implementing connection monitoring and alerting mechanisms to detect unusual connection patterns that might trigger this vulnerability. Additionally, deploying redundant Routinator instances and implementing proper load balancing can help maintain service availability even if individual instances encounter this condition. The fix should include comprehensive error handling that properly manages connection resets regardless of timing, ensuring that Routinator can maintain operational stability under various network conditions while preserving its critical role in Internet routing security.