PT-2017-2899 · D Link · D-Link Dir-850L

Pierre Kim · Published 2017-09-08 · Updated 2023-11-08 · CVE-2017-14421

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions D-Link DIR-850L REV. B versions through FW208WWb02

Description The issue is related to a hardcoded password for the Alphanetworks account, which is set to wrgac25 dlink.2013gui dir850l upon device reset. This allows remote attackers to obtain root access via a TELNET session. The vulnerability is associated with the hardcoded registration data in the D-Link DIR-850L router's firmware.

Recommendations For D-Link DIR-850L REV. B versions through FW208WWb02, consider changing the hardcoded password for the Alphanetworks account to prevent unauthorized access. As a temporary workaround, restrict TELNET access to the device until a patch is available.

Exploit

Fix

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

BDU:2017-02220

CVE-2017-14421

Affected Products

D-Link Dir-850L

References · 4

• 🔥 https://pierrekim.github.io/blog/2017-09-08-dlink-850l-mydlink-cloud-0days-vulnerabilities.html · Exploit
• https://bdu.fstec.ru/vul/2017-02220 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2017-14421 · Security Note
• https://osv.dev/vulnerability/CVE-2017-14421 · Vendor Advisory