CVE-2024-24782 in F30 03X YY COM
Summary
by MITRE • 02/13/2024
An unauthenticated attacker can send a ping request from one network to another through an error in the origin verification even though the ports are separated by VLAN.
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Analysis
by VulDB Data Team • 10/18/2024
This vulnerability represents a significant network security flaw in VLAN segmentation controls that allows unauthorized cross-network communication through improperly validated ping requests. The issue stems from a failure in origin verification mechanisms that should prevent traffic from traversing VLAN boundaries when ports are properly separated. An attacker can exploit this weakness to send ping requests from one network segment to another, effectively bypassing the fundamental security principle that VLANs are designed to isolate network traffic. The vulnerability specifically targets the validation process that should occur when processing incoming ping requests, where the system fails to properly verify that the originating network is within the expected VLAN boundaries. This allows for arbitrary network discovery and potential lateral movement attacks, as the attacker can probe network topology and identify hosts on different VLAN segments without authentication. The flaw essentially creates a backdoor communication channel that undermines the entire purpose of VLAN-based network segmentation, which is a core component of network security architecture.
The technical implementation of this vulnerability involves a failure in the network protocol stack's handling of ICMP echo requests and their associated source address validation. When a ping request is received, the system should validate that the source IP address belongs to the same VLAN or subnet as the receiving interface. However, the vulnerability occurs during this validation process where the system incorrectly accepts requests from unauthorized VLANs. This typically involves a flaw in the routing or packet filtering logic that doesn't properly check VLAN tags or interface membership before processing the ping request. The error likely occurs in the kernel network stack or network switch processing logic where VLAN membership verification is either bypassed or improperly implemented. This vulnerability aligns with CWE-284 Access Control Issues, specifically related to insufficient verification of source addresses or network boundaries. The flaw represents a classic case of privilege escalation through network boundary bypass, where an attacker can gain unauthorized access to network information that should be restricted to specific VLAN segments.
The operational impact of this vulnerability is substantial as it enables attackers to perform reconnaissance activities without authentication, potentially leading to more serious exploitation attempts. Network administrators lose visibility into their segmented network architecture, as attackers can discover hosts, services, and network topology information across VLAN boundaries. This vulnerability can facilitate advanced persistent threat campaigns where attackers use the information gathered to plan more targeted attacks against specific network segments. The ability to send ping requests across VLANs also enables denial-of-service attacks by flooding network segments with traffic, potentially disrupting critical services. Additionally, this vulnerability can be leveraged to map network architecture and identify potential targets for further exploitation, as attackers can determine which hosts are active and accessible across different network segments. The impact extends beyond simple information disclosure, as it fundamentally compromises the network's security posture by breaking down the isolation that VLANs are designed to provide. This vulnerability directly violates the principle of least privilege and network segmentation, which are fundamental requirements in cybersecurity frameworks such as those outlined in the NIST Cybersecurity Framework and ISO 27001 standards.
Mitigation strategies for this vulnerability should focus on implementing proper VLAN boundary enforcement and strengthening origin verification mechanisms. Network administrators should immediately configure proper access control lists and firewall rules to prevent cross-VLAN ICMP traffic, ensuring that only authorized communication paths exist between network segments. The implementation of proper VLAN tagging verification and source address validation should be enforced at all network boundaries, particularly at switches and routers where VLAN segmentation occurs. Regular network audits should be conducted to verify that VLAN configurations are properly enforced and that no unauthorized cross-traffic is occurring. Network segmentation should be reviewed and reinforced through proper network design principles, ensuring that VLANs are correctly implemented and that inter-VLAN routing is properly controlled. Additionally, network monitoring systems should be enhanced to detect and alert on unusual cross-VLAN communication patterns, providing visibility into potential exploitation attempts. The vulnerability also highlights the importance of proper network protocol implementation and validation, emphasizing that all network traffic should undergo rigorous validation before being processed, particularly when dealing with network boundary crossing requests. Organizations should also implement network intrusion detection systems that can identify anomalous ping behavior across VLAN boundaries and provide immediate alerts to security teams for incident response activities.