CVE-2020-15635: netgear r6700_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2020-15635 is a high (CVSS 8.8) Stack-based Buffer Overflow vulnerability in netgear r6700_firmware. EPSS estimates a 2.64% chance of exploitation in the next 30 days, higher than 85.4% of scored vulnerabilities.

Timeline

1. 19-08-2020
   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 R6700 V1.0.4.84_10.0.58 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the acsd service, which listens on TCP port 5916 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-9853.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).