CVE-2022-24674 in imageCLASS MF644Cdw
Summary
by MITRE • 03/28/2023
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF644Cdw 10.02 printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the privet API. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15834.
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Analysis
by VulDB Data Team • 05/03/2026
The CVE-2022-24674 vulnerability represents a critical buffer overflow flaw in Canon imageCLASS MF644Cdw printers running firmware version 10.02, exposing a significant security weakness that allows remote code execution without authentication. This vulnerability specifically affects the privet API implementation within the printer's web interface, making it particularly dangerous as it can be exploited by attackers who are merely adjacent to the network rather than requiring direct physical access or network-level credentials. The flaw stems from inadequate input validation mechanisms that fail to properly check the length of user-supplied data before copying it into a fixed-length stack-based buffer, creating an exploitable condition that can be leveraged by malicious actors to gain elevated privileges. The vulnerability's severity is amplified by the fact that it operates in a privileged execution context, allowing successful exploitation to result in code execution with root-level privileges, effectively providing attackers with complete control over the affected device.
The technical implementation of this vulnerability aligns with common software security flaws categorized under CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking permits data to overwrite adjacent memory locations. The privet API serves as the attack vector through which malicious input can be injected into the printer's processing pipeline, where the lack of proper input sanitization allows attackers to craft specifically formatted payloads that exceed the allocated buffer space. This condition creates a predictable memory corruption scenario that can be exploited using standard buffer overflow techniques to overwrite return addresses and function pointers, ultimately enabling arbitrary code execution. The vulnerability's exploitation does not require authentication, meaning that any network-adjacent attacker can potentially compromise the device, making it particularly concerning for enterprise environments where printer networks may not be adequately segmented from critical infrastructure.
The operational impact of CVE-2022-24674 extends beyond simple device compromise, as it provides attackers with a persistent foothold within network environments where printers are often overlooked in security assessments. Once exploited, the root-level execution capability allows attackers to modify printer configurations, intercept print jobs, potentially establish backdoors for future access, or use the compromised device as a launching point for lateral movement attacks against other network resources. The vulnerability's network-adjacent requirement means that attackers do not need to be physically present or have network-level access to exploit the flaw, as it can be triggered through web-based interfaces or network protocols that the printer exposes. This makes the vulnerability particularly dangerous in environments where printer networks are not properly isolated from sensitive internal systems, as the compromised device could serve as an entry point for broader network infiltration activities.
Mitigation strategies for this vulnerability should include immediate firmware updates from Canon to address the buffer overflow condition in the privet API implementation, along with network segmentation measures that isolate printer devices from critical network segments. Organizations should implement network monitoring to detect unusual traffic patterns that may indicate exploitation attempts, and consider disabling unnecessary web services or APIs on printer devices that are not actively required for business operations. The vulnerability's classification under ATT&CK technique T1059.007 for command and scripting interpreter indicates that successful exploitation would likely involve executing malicious commands through the printer's web interface, making input validation and access control measures crucial defensive controls. Additionally, regular security assessments of networked devices should include thorough examination of printer configurations and network exposure to prevent similar vulnerabilities from being exploited in other devices within the organization's infrastructure.