CVSS: 4.7EPSS: 0%CPEs: 312EXPL: 1CVE-2021-27853 – L2 network filtering can be bypassed using stacked VLAN0 and LLC/SNAP headers
https://notcve.org/view.php?id=CVE-2021-27853
Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers. Las capacidades de filtrado de la red de capa 2, como la protección IPv6 RA o la inspección ARP, pueden omitirse usando combinaciones de encabezados VLAN 0 y encabezados LLC/SNAP • https://blog.champtar.fr/VLAN0_LLC_SNAP https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08 https://kb.cert.org/vuls/id/855201 https://standards.ieee.org/ieee/802.1Q/10323 https://standards.ieee.org/ieee/802.2/1048 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-VU855201-J3z8CKTX • CWE-290: Authentication Bypass by Spoofing •
CVSS: 8.1EPSS: 0%CPEs: 418EXPL: 0CVE-2021-34739 – Cisco Small Business Series Switches Session Credentials Replay Vulnerability
https://notcve.org/view.php?id=CVE-2021-34739
A vulnerability in the web-based management interface of multiple Cisco Small Business Series Switches could allow an unauthenticated, remote attacker to replay valid user session credentials and gain unauthorized access to the web-based management interface of an affected device. This vulnerability is due to insufficient expiration of session credentials. An attacker could exploit this vulnerability by conducting a man-in-the-middle attack against an affected device to intercept valid session credentials and then replaying the intercepted credentials toward the same device at a later time. A successful exploit could allow the attacker to access the web-based management interface with administrator privileges. Una vulnerabilidad en la interfaz de administración basada en web de varios switches Cisco Small Business Series podría permitir a un atacante remoto no autenticado reproducir credenciales de sesión de usuario válidas y conseguir acceso no autorizado a la interfaz de administración basada en web de un dispositivo afectado. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-switches-tokens-UzwpR4e5 • CWE-613: Insufficient Session Expiration •
CVSS: 5.3EPSS: 0%CPEs: 132EXPL: 0CVE-2021-40127 – Cisco Small Business 200, 300, and 500 Series Switches Web-Based Management Interface Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2021-40127
A vulnerability in the web-based management interface of Cisco Small Business 200 Series Smart Switches, Cisco Small Business 300 Series Managed Switches, and Cisco Small Business 500 Series Stackable Managed Switches could allow an unauthenticated, remote attacker to render the web-based management interface unusable, resulting in a denial of service (DoS) condition. This vulnerability is due to improper validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to cause a permanent invalid redirect for requests sent to the web-based management interface of the device, resulting in a DoS condition. Una vulnerabilidad en la interfaz de administración basada en la web de los switches inteligentes Cisco Small Business 200 Series, los switches gestionados Cisco Small Business 300 Series y los switches gestionados apilables Cisco Small Business 500 Series podría permitir a un atacante remoto no autenticado inutilizar la interfaz de administración basada en la web, resultando en una condición de denegación de servicio (DoS). • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-smb-switches-web-dos-xMyFFkt8 • CWE-20: Improper Input Validation •
CVSS: 7.5EPSS: 0%CPEs: 258EXPL: 1CVE-2019-15993 – Cisco Small Business Switches Information Disclosure Vulnerability
https://notcve.org/view.php?id=CVE-2019-15993
A vulnerability in the web UI of Cisco Small Business Switches could allow an unauthenticated, remote attacker to access sensitive device information. The vulnerability exists because the software lacks proper authentication controls to information accessible from the web UI. An attacker could exploit this vulnerability by sending a malicious HTTP request to the web UI of an affected device. A successful exploit could allow the attacker to access sensitive device information, which includes configuration files. Una vulnerabilidad en la Interfaz de Usuario web de Cisco Small Business Switches, podría permitir a un atacante remoto no autenticado acceder a información confidencial del dispositivo. • https://www.exploit-db.com/exploits/51248 http://packetstormsecurity.com/files/171723/Cisco-Dell-Netgear-Information-Disclosure-Hash-Decrypter.html https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200129-smlbus-switch-disclos • CWE-16: Configuration CWE-287: Improper Authentication •
CVSS: 5.3EPSS: 0%CPEs: 228EXPL: 0CVE-2020-3496 – Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability
https://notcve.org/view.php?id=CVE-2020-3496
A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. • https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbss-ipv6-dos-tsgqbffW • CWE-20: Improper Input Validation •