Log4j and Sl4j is upgraded because of CVE-2019-1751 vulnerability to … #3033
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Log4j and sl4j upgraded because of CVE-2019-1751-vulnerability and also some errors fixed after build.
Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17.