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Excerpt

Possible DoS attack when using URLValidator


Who should read this

All Struts 2 developers and users

Impact of vulnerability

Possible DoS attack when using URLValidator

Maximum security rating

Low

Recommendation

Upgrade to Struts 2.3.29 or Struts 2.5.

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13

Affected Software

Struts 2.3.20 - 2.3.28.1

and

Struts 2.5 - 2.5.12

Reporter

ASAI Ken tc535mr2 at gmail dot com

CVE Identifier

CVE-2016-4465

Problem

If an application allows enter na URL field in a form and built-in URLValidator is used, it is possible to prepare a special URL which will be used to overload server process when performing validation of the URL.

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Upgrade to Apache Struts version 2.3.29 or 2.5.113.

Backward compatibility

No backward incompatibility issues are expected.

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