PT-2017-2898 · D Link · D-Link Dir-850L

Pierre Kim · Published 2017-09-08 · Updated 2025-05-06 · CVE-2017-14429

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. A versions through FW114WWb07 h2ab beta1 D-Link DIR-850L REV. B versions through FW208WWb02

Description The issue is related to the DHCP service in the D-Link DIR-850L router's firmware, specifically with the handling of input data in the /etc/services/INET/inet ipv4.php file. This can be exploited by a remote attacker to execute arbitrary code with root privileges using shell metacharacters. The vulnerability affects the generation of files such as WAN-1-udhcpc.sh.

Recommendations For D-Link DIR-850L REV. A versions through FW114WWb07 h2ab beta1, update the firmware to a version later than FW114WWb07 h2ab beta1 to resolve the issue. For D-Link DIR-850L REV. B versions through FW208WWb02, update the firmware to a version later than FW208WWb02 to resolve the issue. As a temporary workaround, consider restricting access to the /etc/services/INET/inet ipv4.php file to minimize the risk of exploitation. Avoid using the WAN-1-udhcpc.sh file until the issue is resolved.

Exploit

Fix

RCE

Command Injection

OS Command Injection

Weakness Enumeration

CWE-77

CWE-78

Related Identifiers

BDU:2017-02219

CVE-2017-14429

Affected Products

D-Link Dir-850L

References · 5

• 🔥 https://pierrekim.github.io/blog/2017-09-08-dlink-850l-mydlink-cloud-0days-vulnerabilities.html · Exploit
• https://osv.dev/vulnerability/CVE-2017-14429 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-14429 · Security Note
• https://bdu.fstec.ru/vul/2017-02219 · Security Note
• https://t.me/cvenotify/120997 · Telegram Post