Vulnerability Details

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

Published: 2020-12-14 11:53:42
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:L/Au:N/C:N/I:N/A:C

Detection Type:
remote_analysis

Solution Type:
Vendor Patch

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

Impact:
By sending repeated requests an attacker is able to constantly restarting the device making it unusable for legit users.

Technical Details:
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.

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

Affected Versions:
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.

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

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2020-26567

References:

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10192
https://www.redteam-pentesting.de/advisories/rt-sa-2020-002
http://packetstormsecurity.com/files/159516/D-Link-DSR-250N-Denial-Of-Service.html
http://seclists.org/fulldisclosure/2020/Oct/14

Severity
Medium
CVSS Score
4.9
Published
2020-12-14
Modified
2020-12-16
Category
Denial of Service

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