A vulnerability in the DNS application layer gateway (ALG) functionality used by Network Address Translation (NAT) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a logic error that occurs when an affected device inspects certain DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through an affected device that is performing NAT for DNS packets. A successful exploit could allow an attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device. The vulnerability can be exploited only by traffic that is sent through an affected device via IPv4 packets. The vulnerability cannot be exploited via IPv6 traffic.
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
User Interaction None
No CVSS v3.0
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
AV:N/AC:M/Au:N/C:N/I:N/A:C
Vendors | Products |
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Cisco |
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Configuration 1 [-]
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References
Link | Resource |
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https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-alg-dos-hbBS7SZE | Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: cisco
Published: 2021-03-24T00:00:00
Updated: 2021-03-24T20:06:20
Reserved: 2020-11-13T00:00:00
Link: CVE-2021-1446
JSON object: View
NVD Information
Status : Modified
Published: 2021-03-24T20:15:15.307
Modified: 2023-11-07T03:28:19.810
Link: CVE-2021-1446
JSON object: View
Redhat Information
No data.
CWE