CVE-2024-0418: Upredsun File Sharing Wizard DoS Vulnerability

CVE-2024-0418 Overview

CVE-2024-0418 affects iSharer and upRedSun File Sharing Wizard versions up to 1.5.0. The vulnerability resides in the GET Request Handler component and allows remote attackers to trigger a denial of service condition. Attackers can exploit the flaw over the network without authentication or user interaction. The exploit has been publicly disclosed, increasing the risk of opportunistic attacks against exposed instances. The weakness is categorized under [CWE-404] Improper Resource Shutdown or Release. VulDB tracks the issue under identifier VDB-250438.

Critical Impact
Remote, unauthenticated attackers can crash or render File Sharing Wizard unavailable by sending crafted GET requests, disrupting file sharing services.

Affected Products

iSharer File Sharing Wizard up to version 1.5.0
upRedSun File Sharing Wizard up to version 1.5.0
Component: GET Request Handler

Discovery Timeline

2024-01-11 - CVE-2024-0418 published to NVD
2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-0418

Vulnerability Analysis

The vulnerability exists within the GET Request Handler of File Sharing Wizard. Manipulation of an unspecified portion of GET request processing causes the application to consume or fail to release resources properly. This results in a denial of service condition impacting service availability. The flaw requires no authentication or user interaction and can be triggered remotely over the network.

The attack targets availability only. Confidentiality and integrity of data on the host are not directly affected. However, the inability to serve file sharing requests disrupts dependent workflows and can be used as part of a larger disruption campaign.

The EPSS probability for CVE-2024-0418 is 0.107%, reflecting limited observed exploitation attempts despite the public disclosure of exploit details.

Root Cause

The root cause maps to [CWE-404] Improper Resource Shutdown or Release. The GET Request Handler fails to properly manage resources when handling certain crafted requests. Repeated or malformed input causes resource starvation or an unrecoverable state in the service process.

Attack Vector

The attack vector is purely network-based. An attacker sends a crafted GET request to the listening port of a vulnerable File Sharing Wizard instance. No credentials, prior access, or social engineering are required. Because the exploit has been publicly disclosed through CXSecurity and VulDB, automated scanners can locate and target exposed services.

No verified exploit code is reproduced here. Refer to the CXSecurity Issue Report and VulDB #250438 for published technical details.

Detection Methods for CVE-2024-0418

Indicators of Compromise

Unexpected termination or unresponsiveness of the File Sharing Wizard process on the host
Spike in inbound GET requests to the File Sharing Wizard listening port from a single or distributed source
Repeated TCP connection failures or resets from clients attempting to reach the service
Process restart events or watchdog-triggered service recoveries correlated with external network traffic

Detection Strategies

Monitor process health for File Sharing Wizard binaries and alert on abnormal exits or restarts
Inspect HTTP access logs for malformed or anomalously long GET requests preceding service failure
Apply network-based detection rules that identify high-rate or repeated GET request patterns targeting the service port
Correlate availability monitoring telemetry with network capture data to confirm DoS conditions

Monitoring Recommendations

Track CPU, memory, and handle count on hosts running File Sharing Wizard to detect resource exhaustion early
Enable centralized logging of HTTP request patterns and forward to a SIEM for pattern analysis
Alert on outbound notifications from File Sharing Wizard about abnormal shutdown or crash dumps
Baseline normal client behavior and flag deviations in request volume, method distribution, and source IP entropy

How to Mitigate CVE-2024-0418

Immediate Actions Required

Restrict network access to File Sharing Wizard instances using firewall rules or host-based access controls
Place the application behind a reverse proxy capable of rate limiting and request validation
Remove or disable File Sharing Wizard if it is not actively required for business operations
Inventory all hosts running iSharer or upRedSun File Sharing Wizard versions up to 1.5.0

Patch Information

At the time of NVD publication, no vendor advisory or patch URL was listed for CVE-2024-0418. Administrators should monitor the vendor channels and the VulDB entry for updates. Where no fix is available, consider replacing File Sharing Wizard with a maintained file sharing solution that receives security updates.

Workarounds

Bind File Sharing Wizard to loopback or internal interfaces only, preventing exposure to untrusted networks
Deploy a web application firewall in front of the service to filter malformed GET requests
Implement connection rate limiting at the network perimeter to slow automated exploitation attempts
Schedule automated process restarts and health checks to reduce the duration of any successful DoS condition

bash

# Example: restrict access to File Sharing Wizard listening port to a trusted subnet
# Replace PORT with the actual service port and SUBNET with your trusted CIDR
iptables -A INPUT -p tcp --dport PORT -s SUBNET -j ACCEPT
iptables -A INPUT -p tcp --dport PORT -j DROP