CVE-2026-19702 in Pardus Boot Repair
Summary
by MITRE • 08/31/2026
Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in TÜBİTAK BİLGEM Software Technologies Research Institute Pardus Boot Repair allows OS Command Injection.
This issue affects Pardus Boot Repair: from 1.0.7 before 1.0.8.
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Analysis
by VulDB Data Team • 08/31/2026
The identified vulnerability represents a critical security flaw within the TÜBİTAK BİLGEM Software Technologies Research Institute's Pardus Boot Repair utility, specifically affecting versions ranging from 1.0.7 up to but not including version 1.0.8. This software component is designed to assist system administrators and users in repairing boot issues on systems running the Pardus Linux distribution, a role that inherently requires elevated privileges and deep interaction with low-level system components such as disk partitions, bootloader configurations, and kernel parameters. The core of this vulnerability lies in an improper neutralization of special elements used in operating system commands, commonly referred to as OS command injection or shell injection. This flaw indicates that the application fails to adequately sanitize user-supplied input before passing it to a underlying shell interpreter for execution, thereby allowing malicious actors to inject arbitrary commands into the context of the running process.
From a technical perspective, this vulnerability is classified under CWE-78, which defines Improper Neutralization of Special Elements used in an OS Command. The mechanism typically involves the application constructing a command string by concatenating user-controlled data with static system commands without applying rigorous validation or escaping rules. In the context of boot repair tools, inputs might include device paths, partition identifiers, or configuration file names provided during the repair process. If these inputs contain shell metacharacters such as semicolons, pipes, ampersands, or backticks, and are not properly escaped, they can terminate the intended command and initiate new commands with the privileges of the application. Since boot repair utilities almost always operate with root-level permissions to modify critical system files and disk structures, successful exploitation would grant an attacker full control over the underlying operating system.
The operational impact of this vulnerability is severe due to the privileged nature of the affected software. An attacker who can trigger this code path could execute arbitrary commands on the host machine as the superuser. This capability allows for a wide range of malicious activities, including but not limited to installing persistent backdoors, exfiltrating sensitive data such as encryption keys or user credentials, modifying system configurations to disable security controls like SELinux or AppArmor, and pivoting to other systems within the network if the compromised host serves as a gateway. The attack vector for this vulnerability is likely local, requiring physical access or prior unauthorized access to the machine where Pardus Boot Repair can be invoked with sufficient privileges. However, in environments where users are granted sudo access to specific administrative tools without full root shell access, this flaw could serve as an effective privilege escalation path from a standard user account to complete system compromise.
This vulnerability aligns with several tactics and techniques within the MITRE ATT&CK framework for both Linux and general enterprise environments. It directly relates to T1059 Command and Scripting Interpreter, specifically sub-techniques involving shell commands or scripts executed via injection. Furthermore, because it involves gaining higher privileges than originally intended through a trusted application, it maps closely to T1068 Exploitation for Privilege Escalation. The lack of input validation also reflects weaknesses in secure coding practices that are often highlighted in CWE-20 Improper Input Validation and CWE-73 External Control of File Name or Path if the injection allows access to unauthorized files through crafted path arguments.
To mitigate this vulnerability, users must upgrade Pardus Boot Repair to version 1.0.8 or later, where the developers have presumably implemented proper input sanitization and command construction practices. In addition to updating software, system administrators should adhere to the principle of least privilege by ensuring that boot repair tools are not accessible via sudo with unrestricted arguments unless absolutely necessary. Input validation should be enforced at multiple layers, including rejecting any input containing shell metacharacters or restricting inputs to a whitelist of known safe characters and formats. For organizations relying on Pardus Linux, monitoring for attempts to invoke this utility with unusual parameters can serve as an early detection mechanism for exploitation attempts in environments where patching may not be immediately feasible.