### Summary
A crafted JSON request can be used to perform a DoS attack when using the Struts REST plugin
| | |
| :------------ | :------------ |
| Who should read this | All Struts 2 developers and users which are using the REST plugin |
| Impact of vulnerability | A DoS attack is possible when using outdated json-lib with the Struts REST plugin |
| Maximum security rating | Medium |
| Recommendation | Upgrade to Struts 2.5.14.1 |
| Affected Software | Struts 2.5 - Struts 2.5.14 |
| Reporter | Huijun Chen, XiaoLong Zhu - Huawei Technologies |
| CVE Identifier | CVE-2017-15707 |
### Problem
The REST Plugin is using an outdated JSON-lib library which is vulnerable and allow perform a DoS attack using malicious request with specially crafted JSON payload.
### Solution
Upgrade to Apache Struts version 2.5.14.1. Another solution is to use the Jackson handler instead of the default JSON-lib handler as described here.
### Backward compatibility
No backward incompatibility issues are expected.
### Workaround
Use Jackson handler instead of the default JSON-lib handler as described here.
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