Description
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.
Published: 2021-10-27
Score: 8.6 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-21443 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.
History

Thu, 07 Nov 2024 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Cisco Adaptive Security Appliance Adaptive Security Appliance Software Asa 5505 Asa 5505 Firmware Asa 5512-x Asa 5512-x Firmware Asa 5515-x Asa 5515-x Firmware Asa 5525-x Asa 5525-x Firmware Asa 5545-x Asa 5545-x Firmware Asa 5555-x Asa 5555-x Firmware Asa 5580 Asa 5580 Firmware Asa 5585-x Asa 5585-x Firmware Firepower Threat Defense
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2024-11-07T21:45:43.962Z

Reserved: 2021-06-15T00:00:00.000Z

Link: CVE-2021-34793

cve-icon Vulnrichment

Updated: 2024-08-04T00:19:48.210Z

cve-icon NVD

Status : Modified

Published: 2021-10-27T19:15:08.563

Modified: 2024-11-21T06:11:13.063

Link: CVE-2021-34793

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses