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CVE-2020-26140

kernel: accepting plaintext data frames in protected networks

An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The WEP, WPA, WPA2, and WPA3 implementations accept plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration.

CVSS 3.1 · 6.5 Medium EPSS 2.9% KEV · Not listed
Vendors
Alfa Arista Cisco and 3 more
Products
Awus036h Awus036h Firmware C-100 and 386 more
CVE-2020-26141

kernel: not verifying TKIP MIC of fragmented frames

An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol.

CVSS 3.1 · 6.5 Medium EPSS 3.1% KEV · Not listed
Vendors
Alfa Cisco Redhat and 1 more
Products
Awus036h Awus036h Firmware Ip Conference Phone 8832 and 188 more
CVE-2020-26139

kernel: Forwarding EAPOL from unauthenticated wifi client

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.

CVSS 3.1 · 5.3 Medium EPSS 6.5% KEV · Not listed
Vendors
Arista Cisco Debian and 3 more
Products
C-100 C-100 Firmware C-110 and 328 more
CVE-2020-24588

kernel: wifi frame payload being parsed incorrectly as an L2 frame

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.

CVSS 3.1 · 3.5 Low EPSS 3.6% KEV · Not listed
Vendors
Arista Cisco Debian and 6 more
Products
C-100 C-100 Firmware C-110 and 348 more
CVE-2022-20933

Cisco Meraki MX and Z3 Teleworker Gateway VPN Denial of Service Vulnerability

A vulnerability in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z3 Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of client-supplied parameters while establishing an SSL VPN session. An attacker could exploit this vulnerability by crafting a malicious request and sending it to the affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to crash and restart, resulting in the failure of the established SSL VPN connections and forcing remote users to initiate a new VPN connection and re-authenticate. A sustained attack could prevent new SSL VPN connections from being established. Note: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention. Cisco Meraki has released software updates that address this vulnerability.

CVSS 3.1 · 8.6 High EPSS 1.1% KEV · Not listed
Vendors
Cisco
Products
Meraki Mx100 Meraki Mx100 Firmware Meraki Mx105 and 43 more
CVE-2020-24587

kernel: Reassembling fragments encrypted under different keys

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed.

CVSS 3.1 · 2.6 Low EPSS 2.6% KEV · Not listed
Vendors
Arista Cisco Debian and 4 more
Products
C-100 C-100 Firmware C-110 and 330 more