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CVE-2021-34793
CVE ID
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CVE-2021-34793
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
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.
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CVSS V3 Severity and Metrics
General Information
Vendors
- cisco
Products
- adaptive security appliance,
- adaptive security appliance software,
- asa 5505 firmware 009.008(004.025),
- asa 5512-x firmware 009.008(004.025),
- asa 5515-x firmware 009.008(004.025),
- asa 5525-x firmware 009.008(004.025),
- asa 5545-x firmware 009.008(004.025),
- asa 5555-x firmware 009.008(004.025),
- asa 5580 firmware 009.008(004.025),
- asa 5585-x firmware 009.008(004.025),
- firepower threat defense
References
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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