CVE-2026-102568 in Parental Control
Summary
by MITRE • 09/29/2026
Pardus Parental Control before 0.7.0 contains an incorrect authorization vulnerability in the polkit policy that allows unprivileged local users to disable parental controls as root. Attackers can invoke PPCActivator.py with the --disable argument via pkexec to remove all restrictions including DNS filtering and application limits without authentication.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified in Pardus Parental Control versions prior to 0.7.0 represents a critical failure in access control mechanisms, specifically within the policy kit configuration used for privilege escalation management. This flaw allows unprivileged local users to bypass intended security restrictions by exploiting an incorrect authorization definition in the polkit policy file. The core technical issue stems from overly permissive rules that grant root-level privileges without requiring proper authentication or validating user intent against established parental control policies. By leveraging this misconfiguration, attackers can execute the PPCActivator.py script with the --disable argument through pkexec, effectively elevating their session to gain administrative rights over the parental control subsystem. This action results in the immediate and silent removal of all enforced restrictions, including DNS filtering rules that block malicious or inappropriate content domains and application limits designed to restrict software usage based on age-appropriate criteria.
From a technical perspective, this vulnerability aligns with CWE-269, which classifies Improper Privilege Management, as well as CWE-862, Missing Authorization, because the system fails to enforce required access control checks before allowing state changes that affect security boundaries. The exploitation path is straightforward and does not require complex payload construction or remote code execution vectors; it relies solely on local interaction with a misconfigured administrative tool. This simplicity makes the vulnerability highly exploitable by any user account present on the affected system, regardless of their initial privilege level. The use of pkexec as an intermediary further complicates mitigation efforts because standard desktop environment security models often trust such tools for legitimate administrative tasks, making it difficult to distinguish between authorized and unauthorized usage without strict policy enforcement at the polkit layer itself.
The operational impact of this vulnerability is severe in environments where parental controls are deployed as a primary defense mechanism against online threats or excessive screen time. Once an attacker disables these controls, they effectively neutralize a significant portion of the system's security posture regarding content filtering and application management. DNS filtering bypasses expose users to potential phishing sites, malware distribution networks, and other malicious infrastructure that would otherwise be blocked at the network resolution stage. Similarly, removing application limits allows unrestricted access to software that may contain its own vulnerabilities or be inappropriate for younger users. This loss of control can lead to data exfiltration, system compromise through subsequent exploitation chains, or behavioral risks in educational and family settings where such controls are mandated by policy.
To mitigate this vulnerability, administrators must update the Pardus Parental Control package to version 0.7.0 or later, which corrects the polkit policy definitions to enforce proper authentication requirements for disabling restrictions. In cases where immediate patching is not feasible, system administrators should review and harden the associated polkit configuration files to ensure that any action modifying parental control states requires explicit root password verification rather than relying on default group memberships or empty rules. Additionally, implementing strict file permissions on the PPCActivator.py script can prevent unauthorized execution by non-administrative users. Regular auditing of policy kit configurations is recommended to detect similar misconfigurations in other administrative tools that interact with system security features, ensuring that privilege escalation paths remain tightly controlled and authenticated according to industry best practices for least-privilege access models.