Vulnerability · Published May 7, 2024 · Assigned by zdi

CVE-2021-34947NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability

High 8.8

In plain English

A high-severity out-of-bounds write in R7800 from NETGEAR. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.0)8.8High

Exploit odds (30 days)0.5%top 53.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.

Affected products (as reported)

Vendor	Product	Versions
NETGEAR	R7800	1.0.2.82

Weakness: CWE-787 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

ZDI-21-1116 x_research-advisory
vendor-provided URL vendor-advisory