CVE-2023-31272 in YF325
Summary
by MITRE • 10/25/2023
A stack-based buffer overflow vulnerability exists in the httpd do_wds functionality of Yifan YF325 v1.0_20221108. A specially crafted network request can lead to stack-based buffer overflow. An attacker can send a network request to trigger this vulnerability.
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Analysis
by VulDB Data Team • 10/31/2023
The vulnerability identified as CVE-2023-31272 represents a critical stack-based buffer overflow within the Yifan YF325 v1.0_20221108 web server implementation. This flaw specifically manifests within the httpd do_wds functionality, which processes specific network requests destined for the device's web interface. The vulnerability stems from inadequate input validation and bounds checking in the handling of network requests, creating an exploitable condition where attacker-controlled data can overwrite adjacent memory locations on the stack. The affected device operates as a web server, making it susceptible to remote exploitation through network-based attacks that leverage this specific functionality.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious network request that exceeds the allocated buffer size within the do_wds function. This buffer overflow scenario allows for arbitrary code execution or system compromise, as the stack memory layout becomes corrupted through the overflow. The flaw directly corresponds to CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking permits memory writes beyond allocated buffer boundaries. This vulnerability type is particularly dangerous as it can lead to complete system compromise, allowing attackers to execute arbitrary commands with the privileges of the affected web server process.
The operational impact of this vulnerability extends beyond simple denial of service, as it creates a potential pathway for full system compromise within the Yifan YF325 device. Remote attackers can leverage this vulnerability to gain unauthorized access to the device's operating system, potentially leading to data exfiltration, system manipulation, or use as a pivot point for attacks against other networked devices. The vulnerability affects devices running the specific firmware version mentioned, with the attack surface limited to the web server functionality that processes requests through the do_wds handler. This presents a significant risk to organizations deploying these devices in networked environments where they may serve as entry points for broader security breaches.
Mitigation strategies for CVE-2023-31272 should prioritize immediate firmware updates from the vendor to address the underlying buffer overflow condition. Organizations should implement network segmentation to limit access to affected devices and monitor network traffic for suspicious requests targeting the vulnerable web server functionality. Additional defensive measures include disabling unnecessary web server features, implementing network access controls, and conducting thorough vulnerability assessments of all networked devices. The vulnerability aligns with ATT&CK technique T1210, which covers exploitation of remote services, and represents a clear example of how inadequate input validation in network services can create persistent security weaknesses. Security teams should also consider implementing intrusion detection systems to monitor for exploitation attempts targeting this specific vulnerability class.