A vulnerability in the DNS application layer gateway (ALG) functionality that is used by Network Address Translation (NAT) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability is due to a logic error that occurs when an affected device inspects certain TCP DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through the affected device that is performing NAT for DNS packets. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on the affected device. Note: This vulnerability can be exploited only by sending IPv4 TCP packets through an affected device. This vulnerability cannot be exploited by sending IPv6 traffic.
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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2022-10-10T20:43:16.154104Z
Updated: 2024-09-16T19:39:57.433Z
Reserved: 2021-11-02T00:00:00
Link: CVE-2022-20837
Vulnrichment
No data.
NVD
Status : Modified
Published: 2022-10-10T21:15:10.137
Modified: 2023-11-07T03:43:05.550
Link: CVE-2022-20837
Redhat
No data.