CVE-2018-0700 in YukiWiki
Summary
by MITRE
YukiWiki 2.1.3 and earlier does not process a particular request properly that may allow consumption of large amounts of CPU and memory resources and may result in causing a denial of service condition.
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Analysis
by VulDB Data Team • 04/13/2020
The vulnerability identified as CVE-2018-0700 affects YukiWiki version 2.1.3 and earlier, representing a critical denial of service weakness that stems from improper request handling within the web application framework. This flaw manifests when the system processes specific requests that trigger excessive resource consumption patterns, ultimately leading to system instability and service unavailability for legitimate users. The vulnerability resides in the application's inability to properly validate or limit resource allocation during request processing, creating an avenue for malicious actors to exploit the system's resource management mechanisms.
From a technical perspective, this vulnerability operates as a resource exhaustion attack vector where crafted requests can cause the application to consume disproportionate amounts of computational resources including cpu cycles and memory allocation. The flaw likely involves inadequate input validation or loop control mechanisms that allow recursive or iterative processing without proper bounds checking. When exploited, these requests can trigger infinite loops, excessive memory allocation, or other resource-intensive operations that overwhelm the system's capacity to handle legitimate traffic. The vulnerability aligns with CWE-400, which categorizes resource exhaustion vulnerabilities as a fundamental weakness in application design that allows attackers to consume system resources beyond normal operational limits.
The operational impact of CVE-2018-0700 extends beyond simple service disruption to potentially compromise the overall system availability and reliability. Attackers can leverage this vulnerability to perform sustained denial of service attacks that may require system restarts or manual intervention to restore normal operations. The resource consumption patterns typically result in system performance degradation that can affect not only the vulnerable application but potentially impact other services running on the same infrastructure. This type of vulnerability represents a significant concern for web applications that handle high volumes of requests, as even a small number of malicious requests can cause substantial system-wide impacts.
Mitigation strategies for this vulnerability should focus on implementing proper request validation and resource limiting mechanisms within the YukiWiki application. System administrators should immediately upgrade to a patched version of YukiWiki that addresses the resource handling flaws, as this represents the most effective solution. Additionally, implementing rate limiting and request monitoring can help detect and prevent exploitation attempts by identifying unusual resource consumption patterns. Network-level protections such as intrusion detection systems and application firewalls can provide additional layers of defense by monitoring for suspicious request patterns that may indicate exploitation attempts. The vulnerability demonstrates the importance of following secure coding practices and implementing proper input validation as outlined in the OWASP Top Ten and MITRE ATT&CK framework categories related to resource exhaustion and denial of service attacks. Organizations should also consider implementing automated monitoring and alerting systems to detect abnormal resource utilization patterns that may indicate exploitation of similar vulnerabilities.