PT-2018-6636 · Dasan · Dasan Gpon Ont Wifi Router H640X

Published 2018-01-21 · Updated 2018-04-08 · CVE-2017-18046

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: Dasan GPON ONT WiFi Router H640X versions 12.02-01121 2.77p1-1124 through 3.03p2-1146

Description: A buffer overflow issue allows remote attackers to execute arbitrary code via a long POST request to the "login action" function in the "/cgi-bin/login action.cgi" endpoint (also known as "cgipage.cgi").

Recommendations: For versions 12.02-01121 2.77p1-1124 through 3.03p2-1146, as a temporary workaround, consider disabling the login action function in the /cgi-bin/login action.cgi endpoint until a patch is available. Restrict access to the /cgi-bin/login action.cgi endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2017-18046

Affected Products

Dasan Gpon Ont Wifi Router H640X

References · 5

• 🔥 https://blogs.securiteam.com/index.php/archives/3552 · Exploit
• https://osv.dev/vulnerability/CVE-2017-18046 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-18046 · Security Note
• https://twitter.com/ankit_anubhav/status/982261670394249216 · Note
• https://pastebin.com/Yxd9S46A · Note