CST-7308 'portlet.resource.id.banned.paths.regexp' bypass with doubled encoded URLs

Description

Liferay Portal before 7.3.1 does not decode a URL before determining if the resource should be served, which allows remote attackers to access restricted portlet resources (e.g., files within /META-INF and /WEB-IN) via double encoded URLs.

Severity

Severity 1

Fixed Version(s)

Notes

CVE-2020-15840 has been assigned to this vulnerability.

Publication Date: 

August 31, 2020

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