References https://mrxn.net/jswz/west-nas-sendLogToSupport-rce.html https://nosec.org/m/share/2664.html https://www.anquanke.com/post/id/161579 https://www.anquanke.com/post/id/85673 https://stack.chaitin.com/poc/detail/127 https://www.cnblogs.com/studyskill/p/6546813.html