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.
Metrics
No CVSS v4.0
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Changed
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
This CVE is not in the KEV list.
Exploitation none
Automatable yes
Technical Impact partial
Affected Vendors & Products
Vendors | Products |
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Cisco |
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Configuration 1 [-]
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No data.
References
History
Sat, 09 Nov 2024 00:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
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MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2021-03-24T20:06:20.372091Z
Updated: 2024-11-08T23:34:59.559Z
Reserved: 2020-11-13T00:00:00
Link: CVE-2021-1446
Vulnrichment
Updated: 2024-08-03T16:11:17.292Z
NVD
Status : Modified
Published: 2021-03-24T20:15:15.307
Modified: 2023-11-07T03:28:19.810
Link: CVE-2021-1446
Redhat
No data.