EasyCTF_2018: Digging For Soup

Category: Web Points: 150 Description:

Perhaps this time I'll have hidden things a little better... you won't find my flag so easily now! nicebowlofsoup.com

Write-up

A stupid challenge worth way too much. Initially, you find out that your usual TXT don't work,

$ dig TXT nicebowlofsoup.com

; <<>> DiG 9.8.3-P1 <<>> TXT nicebowlofsoup.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36765
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;nicebowlofsoup.com.        IN  TXT

;; ANSWER SECTION:
nicebowlofsoup.com. 80  IN  TXT "Close, but no cigar... where else could it be?"

;; Query time: 35 msec
;; SERVER: 192.168.144.1#53(192.168.144.1)
;; WHEN: Mon Feb 12 03:37:36 2018
;; MSG SIZE  rcvd: 95

A little bit of poking around later, you arrive at the stupidest solution of all,

$ dig TXT easyctf.nicebowlofsoup.com

; <<>> DiG 9.8.3-P1 <<>> TXT easyctf.nicebowlofsoup.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46658
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;easyctf.nicebowlofsoup.com.    IN  TXT

;; ANSWER SECTION:
easyctf.nicebowlofsoup.com. 299 IN  TXT "easyctf{why_do_i_even_have_this_domain}"

;; Query time: 59 msec
;; SERVER: 192.168.144.1#53(192.168.144.1)
;; WHEN: Mon Feb 12 03:34:45 2018
;; MSG SIZE  rcvd: 96

NINJA EDIT: After the challenge has been reworked, the solution requires the use of AXFR instead.

$ dig ns2.nicebowlofsoup.com

; <<>> DiG 9.10.3-P4-Ubuntu <<>> ns2.nicebowlofsoup.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5587
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ns2.nicebowlofsoup.com.        IN  A

;; ANSWER SECTION:
ns2.nicebowlofsoup.com. 86145   IN  A   159.65.43.62

;; Query time: 1 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Tue Feb 20 14:56:55 UTC 2018
;; MSG SIZE  rcvd: 67

$ dig axfr nicebowlofsoup.com @159.65.43.62

; <<>> DiG 9.10.3-P4-Ubuntu <<>> axfr nicebowlofsoup.com @159.65.43.62
;; global options: +cmd
nicebowlofsoup.com. 86400   IN  SOA ns1.nicebowlofsoup.com. hostmaster.nicebowlofsoup.com. 2018021205 28800 7200 604800 86400
easyctf.nicebowlofsoup.com. 10  IN  TXT "easyctf{why_do_i_even_have_this_domain}"
nicebowlofsoup.com. 100 IN  TXT "Close, but no cigar... where else could it be? hint: the nameserver's IP is 159.65.43.62"
nicebowlofsoup.com. 86400   IN  SOA ns1.nicebowlofsoup.com. hostmaster.nicebowlofsoup.com. 2018021205 28800 7200 604800 86400
;; Query time: 17 msec
;; SERVER: 159.65.43.62#53(159.65.43.62)
;; WHEN: Tue Feb 20 14:56:35 UTC 2018
;; XFR size: 4 records (messages 3, bytes 404)

Therefore, the flag is easyctf{why_do_i_even_have_this_domain}.

results matching ""

    No results matching ""