PT-2018-2065 · D Link · D-Link Dir-816

Published 2018-12-20 · Updated 2023-04-26 · CVE-2018-20305

Positive Technologies (AI Summary)

CVSS v3.1

9.8

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-816 A2 version 1.10 B05

Description The issue allows for arbitrary remote code execution without authentication via the newpass parameter. In the "/goform/form2userconfig.cgi" handler function, a long password may lead to a stack-based buffer overflow and overwrite a return address. This is caused by a buffer overflow in the /goform/form2userconfig.cgi component of the D-Link DIR-816 router's firmware, which can be exploited by a remote attacker to execute arbitrary code.

Recommendations For D-Link DIR-816 A2 version 1.10 B05, as a temporary workaround, consider restricting access to the "/goform/form2userconfig.cgi" handler function until a patch is available. Avoid using long passwords in the newpass parameter to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

BDU:2019-00015

CVE-2018-20305

Affected Products

D-Link Dir-816

References · 6

• 🔥 https://github.com/RootSoull/Vuln-Poc/tree/master/D-Link/DIR-816 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2018-20305 · Security Note
• https://bdu.fstec.ru/vul/2019-00015 · Security Note
• https://osv.dev/vulnerability/CVE-2018-20305 · Vendor Advisory
• https://cxsecurity.com/cveshow/CVE-2018-20305 · Note
• https://vuldb.com/?id.128135 · Note