Cisco IOS XE Software denial of service | CVE-2022-20837
NAME
Cisco IOS XE Software denial of service
- Platforms Affected:
Cisco IOS XE Software - Risk Level:
8.6 - Exploitability:
Unproven - Consequences:
Denial of Service
DESCRIPTION
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
- Scope: Changed
- Access Vector: Network
- Access Complexity: Low
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
- Remediation Level: Official Fix
MITIGATION
Refer to Cisco Security Advisory cisco-sa-alg-dos-KU9Z8kFX for patch, upgrade or suggested workaround information. See References.
- Reference Link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-alg-dos-KU9Z8kFX - Reference Link:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-20837
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