CVE-2021-27905 PoC — SSRF vulnerability with the Replication handler

Source

Associated Vulnerability

Title: SSRF vulnerability with the Replication handler (CVE-2021-27905)
Description:The ReplicationHandler (normally registered at "/replication" under a Solr core) in Apache Solr has a "masterUrl" (also "leaderUrl" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the "shards" parameter. Prior to this bug getting fixed, it did not. This problem affects essentially all Solr versions prior to it getting fixed in 8.8.2.

Description

CVE-2021-27905

Readme

# Solr-SSRF
CVE-2021-27905

* Burp文件的repeat包里有复现的具体步骤

* POC为Xray的检测插件


![image](https://github.com/W2Ning/Solr-SSRF/blob/main/example.png)

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