CVE-2021-34793
published 2021-10-27CVE-2021-34793: A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent…
PriorityP347high8.6CVSS 3.1
AVNACLPRNUINSCCNINAH
EPSS
0.59%
47.4th percentile
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.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | adaptive_security_appliance | < 9.8.4.40 | 9.8.4.40 |
| cisco | adaptive_security_appliance | — | — |
| cisco | adaptive_security_appliance_software | >= 9.13.0 < 9.14.3.9 | 9.14.3.9 |
| cisco | adaptive_security_appliance_software | >= 9.15.0 < 9.15.1.17 | 9.15.1.17 |
| cisco | adaptive_security_appliance_software | >= 9.16.0 < 9.16.2.3 | 9.16.2.3 |
| cisco | adaptive_security_appliance_software | >= 9.9.0 < 9.12.4.29 | 9.12.4.29 |
| cisco | asa_5505_firmware | — | — |
| cisco | asa_5512-x_firmware | — | — |
| cisco | asa_5515-x_firmware | — | — |
| cisco | asa_5525-x_firmware | — | — |
| cisco | asa_5545-x_firmware | — | — |
| cisco | asa_5555-x_firmware | — | — |
| cisco | asa_5580_firmware | — | — |
| cisco | asa_5585-x_firmware | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | secure_firewall_threat_defense | < 6.4.0.13 | 6.4.0.13 |
| cisco | secure_firewall_threat_defense | >= 6.5.0 < 6.6.5 | 6.6.5 |
| cisco | secure_firewall_threat_defense | >= 6.7.0 < 6.7.0.3 | 6.7.0.3 |
CVSS provenance
nvdv3.18.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
vendor_cisco8.6HIGH
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Cisco
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability
vendor_cisco·2021-10-27·CVSS 8.6
CVE-2021-34793 [HIGH] CWE-924 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability
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.
Ci
Cisco
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2021-34793 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Transparent Mode Denial of Service Vulnerability
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
GHSA
GHSA-jjpm-mxjp-g6mw: A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in tra
ghsa_unreviewed·2022-05-24
CVE-2021-34793 [HIGH] CWE-924 GHSA-jjpm-mxjp-g6mw: A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in tra
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-10-27
Published