PT-2021-21091 · NetGear · Netgear Wac104

Gynvael Coldwind · Published 2021-06-30 · Updated 2022-07-12 · CVE-2021-35973

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: NETGEAR WAC104 versions prior to 1.0.4.15

Description: The issue allows an unauthenticated attacker to bypass authentication by invoking any action through the /usr/sbin/mini httpd service. This is achieved by adding the &currentsetting.htm substring to the HTTP query. As a result, the attacker can change the web UI password and enable debug mode, which allows access to the device as the admin limited-user account. Due to weak permissions on the /etc/ directory, escalation to root is relatively simple.

Recommendations: For versions prior to 1.0.4.15, update to version 1.0.4.15 or later to resolve the issue. As a temporary workaround, consider restricting access to the /usr/sbin/mini httpd service to minimize the risk of exploitation. Avoid using the &currentsetting.htm substring in HTTP queries until the issue is resolved.

Exploit

Fix

Weakness Enumeration

CWE-697

Related Identifiers

CVE-2021-35973

Affected Products

Netgear Wac104

References · 6

• 🔥 https://gynvael.coldwind.pl/?lang=en&id=736 · Exploit
• https://osv.dev/vulnerability/CVE-2021-35973 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-35973 · Security Note
• https://kb.netgear.com/000063785/Security-Advisory-for-Authentication-Bypass-on-WAC104-PSV-2021-0075 · Vendor Advisory
• https://t.me/cibsecurity/25827 · Telegram Post
• https://t.me/cvenotify/16925 · Telegram Post