Quantum Secular Labs / Blog / Advisories

CVE-2018-21097: Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker.

CVE-2018-21097 is rated critical with a CVSS v3.1 base score of 9.8 and NVD lists 11 affected products, including Netgear Wac505 Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects WAC505 before 5.0.5.4, WAC510 before 5.0.5.4, WAC120 before 2.1.7, WN604 before 3.3.10, WNAP320 before 3.7.11.4, WNAP210v2 before 3.7.11.4, WNDAP350 before 3.7.11.4, WNDAP360 before 3.7.11.4, WNDAP660 before 3.7.11.4, WNDAP620 before 2.1.7, and WND930 before 2.1.5.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-787: Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Affected products

  • Netgear Wac505 Firmware: before 5.0.5.4
  • Netgear Wac510 Firmware: before 5.0.5.4
  • Netgear Wac120 Firmware: before 2.1.7
  • Netgear Wn604 Firmware: before 3.3.10
  • Netgear Wnap320 Firmware: before 3.7.11.4
  • Netgear Wnap210 Firmware: before 3.7.11.4
  • Netgear Wndap350 Firmware: before 3.7.11.4
  • Netgear Wndap360 Firmware: before 3.7.11.4
  • Netgear Wndap660 Firmware: before 3.7.11.4
  • Netgear Wndap620 Firmware: before 2.1.7
  • Netgear Wnd930 Firmware: before 2.1.5

References