CVE-2023-25281 in DIR820LA1
Summary
by MITRE • 03/16/2023
A stack overflow vulnerability exists in pingV4Msg component in D-Link DIR820LA1_FW105B03, allows attackers to cause a denial of service via the nextPage parameter to ping.ccp.
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Analysis
by VulDB Data Team • 10/30/2025
The stack overflow vulnerability identified as CVE-2023-25281 resides within the pingV4Msg component of D-Link DIR820LA1_FW105B03 firmware, representing a critical security flaw that enables remote attackers to execute denial of service attacks. This vulnerability specifically manifests when the nextPage parameter is submitted to the ping.ccp endpoint, creating an exploitable condition that can be leveraged to disrupt normal network operations.
The technical implementation of this vulnerability stems from inadequate input validation within the firmware's web interface handling mechanism. When the nextPage parameter is processed through the ping.ccp endpoint, the system fails to properly sanitize or limit the length of user-supplied input, allowing an attacker to overflow the allocated stack buffer. This classic stack buffer overflow condition occurs because the firmware does not enforce strict bounds checking on the input data, permitting maliciously crafted payloads to overwrite adjacent memory locations including return addresses and control data structures.
From an operational perspective, this vulnerability presents significant risks to network availability and system stability. An attacker who successfully exploits this stack overflow can cause the affected router to crash or become unresponsive, effectively rendering the network infrastructure unavailable to legitimate users. The denial of service impact extends beyond simple disruption as it can potentially lead to complete network outages, particularly in environments where the affected device serves as a primary gateway or router for network connectivity.
The vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflow conditions where data is written beyond the bounds of a stack-allocated buffer. This classification indicates the fundamental flaw lies in improper memory management and insufficient input validation within the firmware's processing logic. Additionally, the attack vector maps to ATT&CK technique T1499.004 Network Denial of Service, where adversaries target network infrastructure to prevent or disrupt services for legitimate users.
Mitigation strategies should prioritize immediate firmware updates from D-Link to address the identified stack overflow vulnerability. Network administrators must also implement network segmentation and access controls to limit exposure to potentially compromised devices. Additional defensive measures include deploying intrusion detection systems to monitor for suspicious parameter submissions and implementing web application firewalls to filter malicious requests before they reach the vulnerable components. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within the network infrastructure and ensure comprehensive protection against similar attack vectors.