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D-Link DSR-250N DoS Vulnerability (CVE-2020-26567)

Information

Severity

Severity

Medium

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

4.9

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:N/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

1 year ago

Modified

Modified

1 year ago

Summary

D-Link DSR-250N devices are prone to a Denial-of-Service (DoS) vulnerability.

Insight

Insight

CGI scripts exist on the router that can be directly accessed with a web browser, without any authentication. In particular, the script '/scgi-bin/upgradeStatusReboot.cgi' executes the command to reboot the device.

Affected Software

Affected Software

D-Link DSR-250N devices with firmware version 3.12 and below are known to be affected. Other D-Link DSR models might be affected as well.

Detection Method

Detection Method

Sends a crafted HTTP GET request and checks if the device isn't accessible anymore afterwards.

Solution

Solution

Update to version 3.17B301C_WW or later. Please see the referenced vendor advisory for more information.

Common Vulnerabilities and Exposures (CVE)

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1. Download Multipass

sudo snap install multipass

2. Launch a multipass instance

multipass launch -c 2 -m 6G -d 20G -n mageni 20.04 && multipass shell mageni

3. Install Mageni

curl -sL https://www.mageni.net/installation | sudo bash

1. If you don’t have it already, install Brew. Then, to install Multipass simply execute:

brew install --cask multipass

2. Launch a multipass instance

multipass launch -c 2 -m 6G -d 20G -n mageni 20.04 && multipass shell mageni

2. Install Mageni

curl -sL https://www.mageni.net/installation | sudo bash

1. Download the installer for Windows

Note: You need Windows 10 Pro/Enterprise/Education v 1803 or later, or any Windows 10 with VirtualBox

2. Ensure your network is private

Make sure your local network is designated as private, otherwise Windows prevents Multipass from starting.

3. Run the installer

You need to allow the installer to gain Administrator privileges.

4. Launch a multipass instance

multipass launch -c 2 -m 6G -d 20G -n mageni 20.04

5. Log into the multipass instance

multipass shell mageni

6. Install Mageni

curl -sL https://www.mageni.net/installation | sudo bash