CVE-2020-26139

medium

Description

An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier to exploit other vulnerabilities in connected clients.

References

https://www.fragattacks.com

https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md

http://www.openwall.com/lists/oss-security/2021/05/11/12

https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu

https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63

Details

Source: MITRE

Published: 2021-05-11

Updated: 2021-10-28

Type: CWE-287

Risk Information

CVSS v2

Base Score: 2.9

Vector: AV:A/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 5.5

Severity: LOW

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.6

Severity: MEDIUM