Support Announcements
(Non-US) DIR-825/E :: FW v3.0.1 :: Unauthenticated Buffer Overflow Vulnerability


On March 9, 2021, a 3rd party security researcher, submitted a report accusing the (non-US) DIR-825/E using firmware v3.0.1 of a LAN-side unauthenticated buffer overflow exploit.   The Vulnerability was confirmed and a patch was issued too close the reported issue.  Please find the beta/hotfix release below

3rd Party Report information


          - Report provided: 4uuu Nya ::  ii _at_ qvq _dot_ im

          - Reference : TBD updaed with Authors Public Disclosure


                   The vulnerability trigger point is at mg_get_var(v2, v4, "error", get_error, 512); function
                   by examination of the firmware and the Proof of Concept:

      import requests
      payload = 'A' * 513
http://localhost:8021/check_browser?error=%s' % payload)


 Affected Models


Model Hardware Revision Affected FW Fixed FW Recommendation  Last Updated
DIR-825/E All Hardware Revisions v3.0.1 & Below Patch Under Investigation Please Download and Update Device 03/11/2021


Regarding Security patch for your D-Link Devices
Firmware updates address the security vulnerabilities in affected D-Link devices. D-Link will update this continually and we strongly recommend all users to install the relevant updates.
Please note that this is a device beta software, beta firmware, or hot-fix release which is still undergoing final testing before its official release. The beta software, beta firmware, or hot-fix is provided on an “as is” and “as available” basis and the user assumes all risk and liability for use thereof. D-Link does not provide any warranties, whether express or implied, as to the suitability or usability of the beta firmware. D-Link will not be liable for any loss, whether such loss is direct, indirect, special or consequential, suffered by any party as a result of their use of the beta firmware.
As there are different hardware revisions on our products, please check this on your device before downloading the correct corresponding firmware update. The hardware revision information can usually be found on the product label on the underside of the product next to the serial number. Alternatively, they can also be found on the device web configuration.