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CVE-2016-4800

Status Candidate

Overview

The path normalization mechanism in PathResource class in Eclipse Jetty 9.3.x before 9.3.9 on Windows allows remote attackers to bypass protected resource restrictions and other security constraints via a URL with certain escaped characters, related to backslashes.

Related Files

Jetty 9.3.8 Path Sanitization
Posted May 30, 2016
Authored by Open Source CERT, Daniele Bianco, Simon Zuckerbraun

The Jetty path normalization mechanism suffers of an implementation issue when parsing the request URLs. The path normalization logic implemented in the PathResource class and introduced in Jetty versions 9.3.x can be defeated by requesting malicious URLs containing specific escaped characters. Leveraging on this weakness, a malicious user can gain access to protected resources (e.g. WEB-INF and META-INF folders and their contents) and defeat application filters or other security constraints implemented in the servlet configuration. Versions 9.3.0 through 9.3.8 are affected.

tags | advisory, web
advisories | CVE-2016-4800
SHA-256 | 26929157b560ea70de00b08c35d3faa27d7dde2502ff66c5a5de0ac9128cc9bc
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