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Vulnerability DatabaseCVE-2020-5403
CVE-2020-5403:
Java vulnerability analysis and mitigation
Overview
Reactor Netty HttpServer versions 0.9.3 and 0.9.4 were found to be vulnerable to a denial of service condition through malformed URLs. The vulnerability was discovered and reported by Wojciech Kuranowski, and was officially published on February 27, 2020 (Spring Blog, Spring Security).
Technical details
The vulnerability occurs when the HttpServer encounters a URISyntaxException, causing the connection to be closed prematurely instead of properly responding with a 400 status code. The vulnerability has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating a high impact on availability (NVD).
Impact
When exploited, this vulnerability results in premature connection termination instead of proper error handling with a 400 response, potentially leading to denial of service conditions for affected servers (Spring Security).
Mitigation and workarounds
Users of affected versions should upgrade to Reactor Netty version 0.9.5 (reactor-bom Dysprosium SR-5). No additional mitigation steps are necessary beyond the version upgrade (Spring Security).
Additional resources
Source: This report was generated using AI
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