Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Local, low-complexity abuse by an unprivileged user (AV:L/AC:L/PR:L); the permission flaw lets tampering alter system-wide DNS, justifying scope change and high C/I/A.
Primary rating from Vendor (TR-CERT).
CVSS VectorVendor: TR-CERT
Lifecycle Timeline
2DescriptionCVE.org
Incorrect Permission Assignment for Critical Resource, Improper Access Control vulnerability in TUBITAK BILGEM Software Technologies Research Institute Pardus-Parental-Control allows DNS Spoofing.
This issue affects Pardus-Parental-Control: from <=0.5.1 before 0.7.0.
AnalysisAI
Local privilege abuse in TUBITAK BILGEM Pardus-Parental-Control (versions up to and including 0.5.1, fixed in 0.7.0) lets a low-privileged local user exploit insecure file/resource permissions to tamper with the tool's DNS configuration and perform DNS spoofing. Because the CVSS scope is changed (S:C), the impact reaches beyond the application to system-wide name resolution, enabling redirection of traffic, bypass of parental filtering, and interception of connections. There is no public exploit identified at time of analysis, but the reachable local vector and low complexity make this a practical concern on shared or managed Pardus endpoints.
Technical ContextAI
Pardus Parental Control is a content-filtering/parental-supervision utility developed for the Pardus Linux distribution by TUBITAK BILGEM's Software Technologies Research Institute. The root cause is CWE-732 (Incorrect Permission Assignment for Critical Resource): a critical resource - most plausibly the application's DNS/filter configuration file, service, or a helper writable component - is assigned permissions that are too permissive, allowing an unprivileged local account to modify it. Since parental-control tools enforce policy by controlling DNS resolution, an attacker who can rewrite the DNS settings governs which upstream resolver the host trusts, which is the mechanism behind the DNS spoofing outcome. The affected CPE is cpe:2.3:a:tubitak_bilgem_software_technologies_research_institute:pardus-parental-control, a distribution-specific desktop application rather than a network service.
RemediationAI
Upgrade to Pardus-Parental-Control 0.7.0 or later, which is the vendor-designated fixed release, as documented in the TR-CERT advisory at https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0500. Where an immediate upgrade is not possible, restrict interactive local access to managed endpoints and audit and tighten the file-system permissions on the application's configuration and DNS-related resources so that only root/administrative accounts can write them, removing group- or world-writable bits - the trade-off is that manual permission changes may be reverted by the application on restart or break its self-update, so re-verify after each run. Additionally, protecting the system DNS configuration (for example enforcing resolver settings via a root-owned mechanism and monitoring for unauthorized changes) limits the DNS-spoofing impact until patching is complete.
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-41765
GHSA-686q-wrh7-cph5