AIOHTTP Denial-of-Service Vulnerability Through Logging Storms Caused by Invalid Cookies

A denial-of-service vulnerability has been identified in AIOHTTP versions through 3.13.2. This issue arises when multiple invalid cookies are read, leading to a excessive generation of warning-level logs. An attacker can exploit this vulnerability by sending a specially crafted Cookie header that triggers the logging storm. The problem occurs when the cookies attribute is accessed within an application.

Impact

Exploitation of this vulnerability causes a logging storm, generating excessive warning-level logs that can overwhelm logging systems and obscure important information.

Remediation

Users can upgrade to AIOHTTP version 3.13.3 or later to address this vulnerability.