ClamAV Server Unauthenticated Access Scanner
This scanner detects the Unauthenticated Access in ClamAV Server. The scanner helps identify the execution of dangerous service commands without needing authentication, including listing system files and shutting down the service.
Short Info
Level
High
Single Scan
Single Scan
Can be used by
Asset Owner
Estimated Time
10 seconds
Time Interval
2 weeks 15 hours
Scan only one
Domain, IPv4, Subdomain
Toolbox
-
ClamAV Server is widely used in both personal and enterprise environments for protecting systems from various kinds of malware. It provides network and file scanning capabilities and is typically deployed in server configurations for its efficiency in handling large volumes of data. Users and system administrators rely on ClamAV for its reputation as a free and open-source tool. The software has been pivotal for automated scans, especially in settings requiring continuous protection against threats. Organizations utilize ClamAV's threat detection for securing email gateways, web servers, and file servers. Its integration capabilities allow it to work with a variety of other security systems, increasing its utility across networks.
Unauthenticated Access vulnerability allows potentially dangerous service commands to be executed without proper authentication. It is critical because it can undermine the security postures of systems using ClamAV Server. This vulnerability affects specific versions, allowing unauthorized users to perform actions such as listing system files and shutting down the service. It poses a serious risk, particularly in shared or multi-user environments, where unauthorized execution of service commands can lead to significant operational disruptions. The ability to bypass authentication indicates weaknesses that need immediate addressing to ensure system integrity. Such vulnerabilities could be leveraged by cybercriminals to compromise systems fully.
The technical detail of this vulnerability lies in its ability to allow execution of commands like 'SCAN' and 'SHUTDOWN' without requiring authentication. The ClamAV Server listens on port 3310, making it susceptible if the service is exposed or not correctly secured behind a firewall. The command 'SCAN' can list non-existent or system files and the 'SHUTDOWN' command can be used to turn off the service, which could halt antivirus protections inadvertently. The problem is persistent in version 0.99.2 and potentially older versions due to improper handling of command authentication. Securing access to this service, such as enforcing authentication checks, is critical to mitigating these risks. This vulnerability is especially critical in environments with exposed network services, requiring careful analysis and remediation.
If exploited, this vulnerability allows attackers unauthorized access to powerful commands such as shutting down the service. Exploitation can lead to significant security breaches, including unauthorized file access and potential service interruptions that leave systems unprotected from threats. It can disrupt normal operations, leading to potential data exposure or loss. Attackers could leverage this vulnerability to stage further attacks, exploiting the lack of authentication to manipulate or compromise system integrity. These effects underline the importance of swift and effective remediation, including validating and securing network configurations to prevent unauthorized access. Addressing this issue helps maintain the confidentiality, integrity, and availability of systems relying on ClamAV.
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