CVE-2024-32269

Executive Summary

CVE-2024-32269 identifies a denial of service (DoS) vulnerability in Yonganda YAD-LOJ V3.0.561. A remote attacker can exploit this flaw by sending a crafted packet, causing the target system to become unresponsive. The vulnerability has a CVSS score of 0.0 (placeholder) and an EPSS score of 0.0%, indicating low exploitation probability at this time. No public proof-of-concept (PoC) code or patch is available. The vendor has not released a fix, leaving systems exposed.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (placeholder – likely to be reassigned)
• Attack Vector: Network (AV:N)
• Attack Complexity: Low (AC:L)
• Privileges Required: None (PR:N)
• User Interaction: None (UI:N)
• Scope: Unchanged (S:U)
• Confidentiality Impact: None (C:N)
• Integrity Impact: None (I:N)
• Availability Impact: High (A:H)
• Threat Level: Medium (due to DoS impact and lack of patch)

Deep Dive & Mechanics

The vulnerability resides in the Yonganda YAD-LOJ V3.0.561 system, likely a network appliance or IoT device. The exact mechanism is undisclosed, but based on the description, a crafted network packet triggers an unhandled exception or resource exhaustion (CWE-400). This could involve:

• Buffer overflow in packet parsing
• Infinite loop in state machine
• Memory exhaustion via malformed headers

The attack requires no authentication and can be launched remotely, making it suitable for botnet-driven DDoS campaigns.

Vulnerable vs. Patched Code

No patch is available. The vulnerable code is in the packet processing module of YAD-LOJ V3.0.561. Without vendor disclosure, the exact vulnerable function is unknown. A hypothetical vulnerable snippet might look like:

// Vulnerable: no bounds checking
void process_packet(char *data, int len) {
    char buffer[256];
    memcpy(buffer, data, len); // overflow if len > 256
}

A patched version would include:

// Patched: bounds check
void process_packet(char *data, int len) {
    char buffer[256];
    if (len > 256) len = 256;
    memcpy(buffer, data, len);
}

Exploitation & Lab Setup

Red Team (Attack Simulation)

1. Reconnaissance: Use Shodan to find exposed YAD-LOJ devices with dork Yonganda YAD-LOJ.
2. Craft Packet: Use Scapy to send a malformed packet:

   from scapy.all import *
   # Example: oversized payload
   packet = IP(dst="target_ip")/TCP(dport=80)/Raw(load="A"*10000)
   send(packet, loop=1, inter=0.01)
   

3. Trigger DoS: Send the crafted packet repeatedly to exhaust resources.

Blue Team (Defense & Detection)

1. Network Monitoring: Deploy Suricata rules (see Detection Engineering) to alert on anomalous packet sizes.
2. Rate Limiting: Implement per-IP rate limiting on network appliances.
3. Honeypot: Deploy a fake YAD-LOJ service to capture exploit attempts.

Indicators of Compromise (IOCs)

• Network: Unusually large TCP/UDP packets (>1500 bytes) targeting port 80/443 of YAD-LOJ devices.
• Logs: System logs showing repeated crashes or watchdog resets.
• File: No file-based IOCs known.

Detection Engineering

YARA Rule

rule CVE_2024_32269_Yonganda_DoS {
    meta:
        description = "Detects crafted packets targeting Yonganda YAD-LOJ DoS"
        author = "Valters IT"
        date = "2025-04-10"
    strings:
        $s1 = "YAD-LOJ" ascii wide nocase
        $s2 = "V3.0.561" ascii wide nocase
    condition:
        $s1 or $s2
}

Sigma Rule

title: Yonganda YAD-LOJ DoS Attempt
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects oversized packets targeting Yonganda YAD-LOJ
logsource:
    category: network_connection
    product: suricata
detection:
    selection:
        dest_port: 80
        packet_size: > 1500
    condition: selection
falsepositives:
    - Legitimate large file uploads
level: high

Suricata Rule

alert tcp any any -> any 80 (msg:"CVE-2024-32269 Yonganda YAD-LOJ DoS Attempt"; flow:to_server; dsize:>1500; classtype:attempted-dos; sid:1000001; rev:1;)

Remediation & Mitigation

• Immediate: Isolate YAD-LOJ devices from untrusted networks. Apply firewall rules to restrict inbound traffic to known IPs.
• Vendor: Contact Yonganda for a patch. If unavailable, consider replacing the device.
• Long-term: Implement network segmentation and intrusion detection systems (IDS) to monitor for anomalous traffic.

Valters IT signature: This report is provided for educational and defensive purposes only. Unauthorized exploitation of CVE-2024-32269 is illegal.