Cisco IOS XE Software denial of service | CVE-2022-20837
Cisco IOS XE Software denial of service
Platforms Affected: Cisco IOS XE Software
Risk Level: 8.6
Consequences: Denial of Service
Cisco IOS XE Software is vulnerable to a denial of service, caused by a logic error that occurs when an affected device inspects certain TCP DNS packets in the DNS application layer gateway (ALG) functionality. By sending specially crafted DNS packets through the affected device that is performing NAT for DNS packets, a remote attacker could exploit this vulnerability to cause an affected device to reload.
CVSS 3.0 Information
Privileges Required: None
User Interaction: None
Access Vector: Network
Access Complexity: Low
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: High
Remediation Level: Official Fix
Refer to Cisco Security Advisory cisco-sa-alg-dos-KU9Z8kFX for patch, upgrade or suggested workaround information. See References.
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