CVE-2026-107067 in SuperDuper
Summary
by MITRE • 10/27/2026
An issue in Shirt Pocket's SuperDuper! 4.0.9 and earlier allow a local attacker to obtain sensitive information
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability identified in versions of the backup utility software known as SuperDuper prior to version 4.0.9 represents a significant security flaw that compromises the confidentiality of user data through unauthorized access by local actors. This application, widely utilized for creating bootable clones and incremental backups on macOS systems, relies heavily on file system operations to replicate directory structures and manage metadata. The core technical deficiency lies in how the software handles permissions and temporary files during its backup processes or when interacting with sensitive configuration areas of the host operating system. Specifically, the flaw allows a local attacker who has already gained access to the user account running the application to exploit insufficient permission checks or insecure file handling practices. This typically manifests as an improper restriction on resource access, where critical data structures are left in states that permit reading by processes with lower privileges than intended, effectively bypassing standard operating system security boundaries designed to isolate user environments from one another.
From a technical perspective, this issue aligns closely with the Common Weakness Enumeration category CWE-200, which defines an exposure of sensitive information to an unauthorized actor. The mechanism often involves race conditions or insecure temporary file creation where backup artifacts are stored in world-readable directories without adequate locking mechanisms or immediate secure deletion after use. Additionally, it may relate to CWE-732, concerning incorrect permission assignment for critical resources, if the application fails to enforce strict access control lists on files generated during the cloning process. By leveraging these weaknesses, a local attacker can intercept sensitive data such as encryption keys, personal documents, or system configuration details that are being processed by SuperDuper in memory or written temporarily to disk. The attack does not require remote network interaction and relies entirely on physical or logical access to the compromised workstation, making it particularly dangerous for mobile devices like laptops where theft is a tangible risk.
The operational impact of this vulnerability extends beyond simple data leakage; it undermines the fundamental trust users place in backup solutions designed to preserve system integrity and facilitate recovery. If an attacker can extract sensitive information during the backup operation, they may gain insights into network configurations, stored credentials, or proprietary business logic contained within backed-up volumes. This exposure facilitates further lateral movement within a local environment, as the stolen data can be used for credential stuffing, social engineering attacks, or targeted exploitation of other services running on the same machine. Furthermore, because SuperDuper often runs with elevated privileges to ensure complete system replication, any flaw in its logic that allows privilege escalation or unauthorized read access poses a severe risk to the entire host system's security posture. The ability for a local user to bypass these controls effectively neutralizes the protective measures provided by macOS sandboxing and file permission models when interacting with this specific application.
Mitigation strategies must prioritize immediate software updates alongside robust operational hygiene practices. Users should upgrade SuperDuper to version 4.0.9 or later, where the developers have addressed the underlying code flaws related to resource handling and permission enforcement. In environments where upgrading is not immediately feasible, administrators should restrict physical access to workstations running this software and enforce strict user account policies that limit local administrative privileges. Additionally, enabling full-disk encryption on macOS devices provides a critical layer of defense in depth; even if an attacker exploits the vulnerability to read temporary files or memory dumps, the encrypted volume ensures that the underlying data remains inaccessible without the proper decryption keys. Regular auditing of application permissions and monitoring for unusual file system activity can also help detect potential exploitation attempts before significant damage occurs.