CVE-2018-1000537 in Marlin
Summary
by MITRE
Marlin Firmware Marlin version 1.1.x and earlier contains a Buffer Overflow vulnerability in cardreader.cpp (Depending on branch/version) that can result in Arbitrary code execution. This attack appear to be exploitable via Crafted G-Code instruction/file is sent to the printer.
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Analysis
by VulDB Data Team • 03/29/2023
The vulnerability identified as CVE-2018-1000537 affects Marlin Firmware versions 1.1.x and earlier, representing a critical buffer overflow flaw within the cardreader.cpp component of the firmware. This issue manifests when the firmware processes crafted g-code instructions or files sent to 3d printers, creating a pathway for arbitrary code execution that can compromise the entire printing system. The vulnerability stems from inadequate input validation and memory management within the firmware's card reading functionality, which fails to properly sanitize or limit the size of data being processed from external storage media.
The technical nature of this flaw places it squarely within the CWE-121 buffer overflow category, where insufficient bounds checking allows attackers to overwrite adjacent memory locations in the printer's firmware execution environment. This vulnerability operates at the intersection of firmware security and embedded system exploitation, leveraging the fact that 3d printers typically execute g-code commands directly without the sophisticated memory protection mechanisms found in traditional computing environments. The attack vector requires the delivery of malicious g-code files through external storage devices such as sd cards or usb drives, making it particularly concerning for environments where untrusted media might be inserted into printers.
The operational impact of this vulnerability extends beyond simple code execution to potentially enable complete system compromise of 3d printers running affected firmware versions. Attackers could leverage this flaw to install persistent backdoors, modify printer behavior, or even use the compromised printer as a platform for further attacks against networked systems. The implications are particularly severe in industrial or research environments where 3d printers may be connected to critical networks or used to produce components for safety-critical applications. This vulnerability represents a significant risk to supply chain security, as compromised printers could serve as entry points for broader network infiltration.
Mitigation strategies for CVE-2018-1000537 should prioritize immediate firmware updates to versions 1.1.2 or later, which contain patches addressing the buffer overflow conditions in cardreader.cpp. Organizations should implement strict access controls for printer interfaces and storage media, including disabling automatic execution of files from external devices and implementing robust file validation procedures. Network segmentation and monitoring of printer communications can help detect anomalous behavior indicative of exploitation attempts. Additionally, the vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter, as successful exploitation would allow attackers to execute arbitrary commands on the affected systems. Regular firmware auditing and secure configuration practices should be implemented to prevent similar vulnerabilities from emerging in other embedded systems that process external input data.