| Description: | Summary:
Apache Tomcat is prone to a security bypass vulnerability.
Vulnerability Insight:
The error page mechanism of the Java Servlet
Specification requires that, when an error occurs and an error page is
configured for the error that occurred, the original request and response are
forwarded to the error page. This means that the request is presented to the
error page with the original HTTP method. If the error page is a static file,
expected behaviour is to serve content of the file as if processing a GET request,
regardless of the actual HTTP method. Tomcat's Default Servlet did not do this.
Depending on the original request this could lead to unexpected and undesirable
results for static error pages including, if the DefaultServlet is configured to
permit writes, the replacement or removal of the custom error page
Vulnerability Impact:
Successful exploitation will allow an attacker to
exploit this issue to bypass certain security restrictions and perform
unauthorized actions. This may lead to further attacks.
Affected Software/OS:
Apache Tomcat 9.0.0.M1 to 9.0.0.M20,
Apache Tomcat 8.5.0 to 8.5.14,
Apache Tomcat 8.0.0.RC1 to 8.0.43 and
Apache Tomcat 7.0.0 to 7.0.77 on Windows
Solution:
Upgrade to version 9.0.0.M21, or 8.5.15,
or 8.0.44, or 7.0.78 or later.
CVSS Score:
5.0
CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N
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