Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade org.eclipse.jetty:jetty-servlets
to version 9.4.41, 10.0.3, 11.0.3 or higher.
org.eclipse.jetty:jetty-servlets is an Utility Servlets from Jetty
Affected versions of this package are vulnerable to Information Exposure. Requests to the ConcatServlet
and WelcomeFilter
are able to access protected resources within the WEB-INF
directory.
For example, a request to the ConcatServlet
with a URI of /concat?/%2557EB-INF/web.xml
can retrieve the web.xml
file.
This occurs because both ConcatServlet
and WelcomeFilter
decode the supplied path to verify it is not within the WEB-INF
or META-INF
directories. It then uses this decoded path to call RequestDispatcher
which will also do decoding of the path. This double decoding allows paths with a doubly encoded WEB-INF
to bypass this security check.