CVE-2024-12647 in Satera MF656Cdw
Summary
by MITRE • 01/28/2025
Buffer overflow in CPCA font download processing of Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the affected product being unresponsive or to execute arbitrary code. *: Satera MF656Cdw/Satera MF654Cdw firmware v05.04 and earlier sold in Japan. Color imageCLASS MF656Cdw/Color imageCLASS MF654Cdw/Color imageCLASS MF653Cdw/Color imageCLASS MF652Cdw/Color imageCLASS LBP633Cdw/Color imageCLASS LBP632Cdw firmware v05.04 and earlier sold in US. i-SENSYS MF657Cdw/i-SENSYS MF655Cdw/i-SENSYS MF651Cdw/i-SENSYS LBP633Cdw/i-SENSYS LBP631Cdw firmware v05.04 and earlier sold in Europe.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 01/26/2026
This buffer overflow vulnerability exists within the CPCA font download processing functionality of several multifunction printer models including the Satera MF656Cdw, Color imageCLASS MF656Cdw, and i-SENSYS MF657Cdw series. The flaw manifests when the printer receives specially crafted font data during the download process, specifically affecting firmware versions 05.04 and earlier across different regional markets. The vulnerability stems from inadequate input validation and bounds checking during font processing operations, creating a classic buffer overflow condition that can be exploited by remote attackers within the same network segment.
The technical implementation of this vulnerability involves the printer's handling of font data structures where insufficient boundary checks allow an attacker to write data beyond the allocated buffer space. This memory corruption occurs during the processing of CPCA font files which are used for print job rendering and display functions. When an attacker sends maliciously formatted font data, the system fails to properly validate the size or content of the incoming data, leading to overwrite of adjacent memory regions. The vulnerability is classified as a CWE-121 stack-based buffer overflow, representing a fundamental memory safety issue that has been documented in numerous printer security assessments.
Operationally, this vulnerability presents significant risks to network security as it allows remote code execution without requiring authentication or physical access to the device. An attacker positioned on the same network segment can exploit this flaw to gain control over the affected printer, potentially leading to complete device compromise. The impact extends beyond simple denial of service since the vulnerability can be leveraged for persistent access, data exfiltration, or as a stepping stone for further network infiltration. The affected devices operate in small office environments where network segmentation may be minimal, increasing the attack surface and potential for lateral movement.
Mitigation strategies should focus on immediate firmware updates from the manufacturer to address the buffer overflow condition through proper input validation and memory bounds checking. Network segmentation practices should be implemented to isolate these devices from critical network segments, while monitoring and logging should be enabled to detect anomalous font download activities. The vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter usage and T1068 for exploit for privilege escalation, making it particularly dangerous in enterprise environments where these devices may be used for sensitive document processing. Organizations should also consider disabling unnecessary network services and implementing strict access controls for printer management interfaces to reduce exploitation opportunities.