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PrinterLogic Vulnerability Allows Remote Code Execution

Vulnerabilities in the PrinterLogic Print Management software could allow an attacker to execute code remotely on endpoints, Sygnia Consulting security researchers have discovered. 

The main issue is that the software does not validate SSL and software update certificates, which could allow an attacker to reconfigure the software. Furthermore, the PrinterLogic agent fails to sanitize browser input, which could be abused by a remote attacker to modify configuration settings. 

The issues have a High severity rating, with a CVSS score of 7.8, a vulnerability note on the CERT Coordination Center website reveals

The first of the discovered vulnerabilities is tracked as CVE-2018-5408, and resides in the PrinterLogic Print Management software not validating, or incorrectly validating, the PrinterLogic management portal’s SSL certificate. 

Thus, an attacker could leverage an invalid or malicious certificate to spoof a trusted entity via a man-in-the-middle (MiTM) attack. The software could be tricked into connecting to a malicious host or into accepting spoofed data that appears to originate from a trusted host. 

The second vulnerability, CVE-2018-5409, resides in the software updating and executing code without sufficiently verifying its origin and integrity. This could allow an attacker to execute malicious code by compromising the host server, performing DNS spoofing, or modifying the code in transit. 

Tracked as CVE-2019-9505, the third issue is that the software does not sanitize special characters, which allows for remote unauthorized changes to configuration files. 

By abusing these vulnerabilities, an unauthenticated attacker may be able to remotely execute arbitrary code with system privileges. 

Impacted users are advised to update their PrinterLogic Print Management software as soon as patches become available.

To avoid MiTM scenarios, users should consider using 'always on' VPN. They should also enforce application whitelisting on the endpoint to prevent the execution of malicious code through the PrinterLogic agent.

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