CVE-2021-27964 Scanner

SonLogger is a software tool used in the logging and management of network and system data, predominantly by IT professionals for monitoring and analysis. The software is typically employed by network administrators and system engineers to keep track of various system and network activities. It provides capabilities for identifying, analyzing, and resolving potential issues in the infrastructure. Enterprises and organizations leverage SonLogger to maintain optimal performance and security of their system environments. The tool helps in detailed audits and assessments, which are crucial for compliance with industry regulations. For organizations, it serves as an indispensable asset in ensuring accurate record-keeping and troubleshooting. Its comprehensive logging capabilities make it a staple in environments where data security and integrity are critical.

The Arbitrary File Upload vulnerability in SonLogger allows malicious users to upload files without proper authentication checks. This security flaw can lead to potential unauthorized access to the server, which affects the integrity and confidentiality of the system. The lack of validation for file types means attackers can execute various malicious files on the server. This vulnerability stems from improper handling and validation of file uploads, posing significant risks to organizational data. Attackers can exploit this to bypass security measures and gain control of system processes. The critical nature of this flaw demands immediate attention and remediation to prevent exploitations.

In the file upload vulnerability of SonLogger, attackers exploit the endpoint /Config/SaveUploadedHotspotLogoFile due to insufficient authentication. The endpoint is vulnerable to POST requests that contain files without the necessary checks for file extensions or content. This absence of validation allows any file type, including executable and script files, to be uploaded and potentially executed. The vulnerability is particularly severe since it doesn't require any session headers or authentication credentials to exploit. The mechanism lacks fundamental security protocols like input validation, allowing attackers to manipulate the system with unintended data. Such oversight in file handling can lead to severe breaches if not immediately corrected.

When exploited, this vulnerability can lead to unauthorized system access and control over SonLogger installations. Malicious files uploaded to the server can compromise sensitive data and applications. Attackers can maintain persistence within compromised networks by leveraging the system to create backdoors. The breach of file integrity affects the organization's data confidentiality and subjects the system to potential data exfiltration. Overall, the exploitation of this vulnerability can significantly disrupt organizational operations, resulting in financial and reputational damage. Rapid interventions and securing upload endpoints are crucial to mitigate these risks.

REFERENCES

• https://erberkan.github.io/2021/SonLogger-vulns/
• https://github.com/erberkan/SonLogger-vulns