PT-2020-14557 · NetGear · Netgear R6700

Pedrib1337 + 3 · Published 2020-08-04 · Updated 2020-08-24 · CVE-2020-15635

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 R6700 version 1.0.4.84 10.0.58

Description This issue allows network-adjacent attackers to execute arbitrary code on affected installations. Authentication is not required to exploit this issue. 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 issue to execute code in the context of the admin user.

Recommendations For NETGEAR R6700 version 1.0.4.84 10.0.58, as a temporary workaround, consider disabling the acsd service until a patch is available. Restrict access to TCP port 5916 to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2020-15635

ZDI-20-936

Affected Products

Netgear R6700

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2020-15635 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-20-936 · Security Note
• https://osv.dev/vulnerability/CVE-2020-15635 · Vendor Advisory
• https://kb.netgear.com/000062127/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-R6700v3-PSV-2020-0202 · Vendor Advisory