PT-2021-17357 · NetGear · Netgear Nighthawk R7800

Hoàng Thạch Nguyên + 1 · Published 2021-02-24 · Updated 2021-04-23 · CVE-2021-27253

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: NETGEAR Nighthawk R7800 (affected versions not specified)

Description: This issue allows network-adjacent attackers to execute arbitrary code on affected installations. Although authentication is required to exploit this issue, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc service parameter provided to "apply bind.cgi". The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this issue to execute code in the context of root.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Heap Based Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-122

CWE-787

Related Identifiers

CVE-2021-27253

ZDI-21-249

Affected Products

Netgear Nighthawk R7800

References · 4

• https://osv.dev/vulnerability/CVE-2021-27253 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27253 · Security Note
• https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-249 · Security Note