CVE-2020-27861: netgear cbk40_firmware OS Command Injection

Vulnerability summary

CVE-2020-27861 is a high (CVSS 8.8) OS Command Injection vulnerability in netgear cbk40_firmware. EPSS estimates a 2.03% chance of exploitation in the next 30 days, higher than 80.7% of scored vulnerabilities.

Timeline

1. 11-02-2021
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.