CVE-2022-4066 in onion
Summary
by MITRE • 11/20/2022
A vulnerability was found in davidmoreno onion. It has been rated as problematic. Affected by this issue is the function onion_response_flush of the file src/onion/response.c of the component Log Handler. The manipulation leads to allocation of resources. The name of the patch is de8ea938342b36c28024fd8393ebc27b8442a161. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-214028.
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Analysis
by VulDB Data Team • 12/20/2022
The vulnerability identified as CVE-2022-4066 resides within the davidmoreno onion framework, specifically targeting the onion_response_flush function located in src/onion/response.c. This issue falls under the category of resource allocation problems that can lead to potential system instability or denial of service conditions. The vulnerability has been classified as problematic by security researchers and represents a significant concern for systems utilizing this particular web framework component. The affected Log Handler component demonstrates how seemingly routine functionality can harbor dangerous flaws when not properly implemented or validated.
The technical flaw manifests through improper resource management within the onion_response_flush function, which is responsible for handling response flushing operations in the web framework's logging mechanism. When this function processes certain input conditions or request patterns, it can trigger unintended resource allocation behaviors that may result in memory exhaustion or other resource-related system failures. This type of vulnerability typically occurs when the code fails to properly validate input parameters or when it does not adequately manage memory allocation cycles, leading to scenarios where resources are allocated without proper subsequent deallocation. The vulnerability is particularly concerning because it operates at the response handling level, which is fundamental to web application functionality and could potentially be exploited by attackers to disrupt service availability.
The operational impact of this vulnerability extends beyond simple resource consumption issues, as it can potentially enable attackers to perform denial of service attacks against applications built on the davidmoreno onion framework. When the resource allocation occurs improperly, it may lead to progressive memory consumption that eventually causes the application to crash or become unresponsive. Systems relying on this framework for logging and response handling could experience degraded performance or complete service interruption, especially under high load conditions where the improper resource management compounds existing system stress. The vulnerability's exploitation potential is heightened by the fact that logging operations are typically frequent and continuous, making the resource consumption issue more pronounced and harder to detect in normal system operation.
Security professionals should immediately implement the patch referenced by the identifier de8ea938342b36c28024fd8393ebc27b8442a161 to address this vulnerability. The patch specifically targets the resource allocation logic within the onion_response_flush function and corrects the improper handling that leads to the problematic behavior. Organizations should conduct thorough testing of the patched version to ensure that the fix does not introduce regressions in other functionality while maintaining the framework's intended logging capabilities. The vulnerability's classification as VDB-214028 indicates that it has been documented and tracked by vulnerability databases, making it easier for security teams to identify and remediate the issue across their infrastructure. This remediation effort should be prioritized in security update schedules and may require coordination with other system components that depend on the onion framework's response handling mechanisms.
From a cybersecurity perspective, this vulnerability aligns with CWE-401, which describes improper resource management issues, and represents a classic example of how resource handling flaws can lead to system instability. The ATT&CK framework would categorize this vulnerability under the resource exhaustion tactic, as it can be leveraged to consume system resources and potentially cause service disruption. The vulnerability demonstrates the importance of proper input validation and resource management practices in web application development, particularly for components that handle response processing and logging operations. Organizations should consider implementing additional monitoring and alerting mechanisms to detect unusual resource consumption patterns that might indicate exploitation attempts against this vulnerability.