CVE-2025-44895 in FW-WGS-804HPT
Summary
by MITRE • 05/21/2025
FW-WGS-804HPT v1.305b241111 was discovered to contain a stack overflow via the ipv4Aclkey parameter in the web_acl_ipv4BasedAceAdd function.
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Analysis
by VulDB Data Team • 05/21/2025
The vulnerability identified as CVE-2025-44895 represents a critical stack overflow condition within the FW-WGS-804HPT v1.305b241111 firmware implementation. This flaw manifests specifically within the web_acl_ipv4BasedAceAdd function where the ipv4Aclkey parameter fails to properly validate input length before processing. The insufficient bounds checking creates an exploitable condition that allows malicious actors to overwrite adjacent stack memory locations through carefully crafted input sequences. Such vulnerabilities typically arise from inadequate input sanitization practices and represent a classic example of buffer overflow exploitation techniques that have been documented extensively in cybersecurity literature.
The technical execution of this vulnerability follows established patterns for stack-based buffer overflow attacks where the ipv4Aclkey parameter serves as the attack vector to overwrite return addresses and control flow information stored on the program stack. When the firmware processes an oversized ipv4Aclkey value, the memory layout becomes corrupted as the input data extends beyond the allocated stack buffer boundaries. This condition creates opportunities for remote code execution or system instability, particularly when the vulnerable function handles untrusted network input through web-based administrative interfaces. The attack surface is significantly expanded when considering that the vulnerability exists within network access control functionality that may be exposed to external network traffic.
From an operational impact perspective, this vulnerability compromises the integrity and availability of the affected network security device. The stack overflow condition can result in arbitrary code execution with the privileges of the affected service process, potentially leading to complete system compromise. Network administrators face significant risk as attackers could exploit this vulnerability to gain unauthorized access to network traffic controls, bypass access restrictions, or establish persistent backdoors within network infrastructure. The vulnerability affects the device's ability to maintain consistent security policies and could enable attackers to manipulate network access controls to allow unauthorized traffic passage.
Security mitigations for this vulnerability should prioritize immediate firmware updates from the vendor to address the buffer overflow condition through proper input validation and bounds checking mechanisms. Network segmentation and access control restrictions should be implemented to limit exposure of the affected device to untrusted networks until patching is complete. The implementation of web application firewalls and input validation rules can provide additional defense-in-depth measures to prevent exploitation attempts targeting this specific vulnerability. Organizations should also consider monitoring network traffic for patterns consistent with exploitation attempts and implementing intrusion detection systems to identify potential exploitation activities. This vulnerability aligns with CWE-121 stack-based buffer overflow conditions and represents a potential technique within the attack patterns cataloged under the attack tactic of privilege escalation and execution within the MITRE ATT&CK framework.