roleattribute that we need to change, in order to escalate our privileges.
accountobject with the
account[role] = adminchanges our
role, granting us access to
username=admin&password=' or '1grants us access.
NAME_SURNAME.txt. Validation is performed so that both fields are alphanumeric characters only.
1_22.txtmatches the created file
rm abc_abc*.txtwould have given this result, so we could hypothesise that a command injection could be performed.
/users/<username>/files, where we can upload files.
/users/<username>, since a valid username results in a 403 redirect to our own account, while an invalid username results in a 404 Not Found error.
dirbwordlist) yielded the following valid usernames:
/users/<username>page, the application does not check whether we are the owner of the file when we request a file at
/users/<username>/files/<filename>. This constitutes an IDOR vulnerability.
/users/employee/files/fileadmin, which was the flag.
[ X ]and
[ Y ]below - these are the coordinates that we clicked.
galleryUrlparameter. By requesting the
/admininternally, we gain access to the admin console:
.htaccessfile to tell Apache to interpret some arbitrary file extension as a PHP file (e.g.
.php16extension results in RCE, and we can download the flag..
root:root. In the
/challengedirectory, there was an encrypted flag and the Python program used to encrypt it.
random.SystemRandom()is cryptographically secure (it uses
os.urandom()), the behaviour when the debug flag is passed is interesting.
getstate()is called on the generator object, but the documentation clearly states that this will raise a
--debug, resulting in
getstate()being called and
NotImplementedErrorbeing raised - so
UNKNOWN_ERROR= 1001 is the token.
Serverresponse header, we could see that the Apache Traffic Server (ATS) 7.1.1 was used,
Transfer-Encodingheader exists, the
Content-Lengthheader is used. This leads to a request smuggling vulnerability if the backend server processes the
Transfer-Encodingheader instead of the
Content-Lengthheader to decide where the request ends.
/save.php, an entry is appended to a "log file", which contains the cookies and the value of the
Content-Lengthheader, and thus forwards the entire payload as a single request to the Nginx backend.
Transfer-Encodingheader and decides that the first request ends early. This is a full, complete request.
private.phpto view the flag.
What does this protocol use to align fields?
A lot of things can happen when structures are not properly aligned
But wait... is the actual value matter?
Not too much to find here... just regular backups
The content is not that useful as it looks like.
Optional padding follows the SMB_Data block of the SMB_COM_CLOSE. If present, the padding is used to align the SMB_Data.Bytes.Data block to a 16- or 32-bit boundary.
WriteX(1 byte padding) and
Trans2(2 byte padding) requests contain the exfiltrated data.
Here is the URL you are looking for: /U,rhbjaaCeDseVRQzEO.YsgXXtoGKpvUEkZXaoxurhdYnIlpJiGszZwUktVWTS,DabQAhvbEDQaNL_Dhsq.pposWkG-DtQdIVXNEWd.KbtYXvCek_gJuzIrDtMHfITFL/flag.png