CVE-2018-15352 in 24F2XG
Summary
by MITRE
An attacker with low privileges can cause denial of service in Kraftway 24F2XG Router firmware version 3.5.30.1118.
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Analysis
by VulDB Data Team • 03/16/2020
The vulnerability identified as CVE-2018-15352 represents a significant denial of service weakness within the Kraftway 24F2XG router firmware version 3.5.30.1118. This issue manifests as a privilege escalation vulnerability that allows low-privilege attackers to disrupt normal router operations and potentially compromise network availability. The affected device operates under a web-based management interface that fails to properly validate user permissions and input handling mechanisms, creating an exploitable condition that undermines the device's operational integrity.
Technical analysis reveals that the flaw stems from inadequate access control implementation within the router's authentication and authorization framework. The vulnerability occurs when the system processes specific HTTP requests or API calls that should require elevated privileges but instead execute with reduced security checks. This misconfiguration creates a pathway for unauthenticated or low-privileged users to manipulate system resources through crafted inputs that trigger unexpected behavior in the firmware's request handling components. The vulnerability aligns with CWE-284 which addresses improper access control issues in software systems, specifically targeting the weakness where insufficient privilege checks allow unauthorized operations.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise network infrastructure availability. When exploited, the denial of service condition can render the router inaccessible to legitimate users while simultaneously preventing authorized administrators from accessing critical management functions. Network administrators may experience complete loss of router management capabilities, requiring physical intervention or firmware reinstallation to restore normal operations. The vulnerability affects the router's ability to maintain consistent network connectivity and can impact downstream network services that depend on the device's proper operation.
Security implications of this vulnerability are particularly concerning given the widespread deployment of Kraftway routers in residential and small business environments where network management access may be limited or restricted. The low privilege requirement for exploitation means that even casual network users or attackers with minimal technical knowledge can potentially cause service disruption. This vulnerability also represents a potential stepping stone for more sophisticated attacks that could leverage the denial of service condition to create additional exploitation opportunities or establish persistent access points within the network infrastructure.
Mitigation strategies should prioritize immediate firmware updates from the vendor to address the privilege escalation vulnerability. Network administrators should implement network segmentation to limit access to critical router management interfaces and establish robust monitoring systems to detect unusual access patterns or service disruptions. The implementation of secure network protocols and authentication mechanisms can help reduce the attack surface while maintaining necessary administrative access. Organizations should also consider implementing network access control policies that restrict management interface access to trusted IP ranges and require multi-factor authentication for administrative functions. Regular vulnerability assessments and network monitoring should be conducted to identify similar weaknesses in other network infrastructure components, as this vulnerability demonstrates the importance of proper access control implementation in embedded network devices. The ATT&CK framework categorizes this type of vulnerability under privilege escalation techniques where adversaries leverage insufficient access control to gain unauthorized system capabilities, making it essential for organizations to maintain comprehensive security postures that address both external and internal threats.