8.6

CVE-2021-34793

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability

A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Cisco ≫ Adaptive Security Appliance Version < 9.8.4.40
Cisco ≫ Secure Firewall Threat Defense Version < 6.4.0.13
Cisco ≫ Secure Firewall Threat Defense Version >= 6.5.0 < 6.6.5
Cisco ≫ Secure Firewall Threat Defense Version >= 6.7.0 < 6.7.0.3
Cisco ≫ Adaptive Security Appliance Software Version >= 9.9.0 < 9.12.4.29
Cisco ≫ Adaptive Security Appliance Software Version >= 9.13.0 < 9.14.3.9
Cisco ≫ Adaptive Security Appliance Software Version >= 9.15.0 < 9.15.1.17
Cisco ≫ Adaptive Security Appliance Software Version >= 9.16.0 < 9.16.2.3
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.67% 0.493
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NIST 5 10 2.9
AV:N/AC:L/Au:N/C:N/I:N/A:P
Cisco PSIRT 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE-924 Improper Enforcement of Message Integrity During Transmission in a Communication Channel

The product establishes a communication channel with an endpoint and receives a message from that endpoint, but it does not sufficiently ensure that the message was not modified during transmission.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL
Vendor Advisory