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Cisco NX-OSIP-in-IP protocol allows a remote, unauthenticated attacker to route arbitrary network traffic

Risk 28
Severity
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

IP-in-IP protocol specifies IP Encapsulation within IP standard (RFC 2003, STD 1) that decapsulate and route IP-in-IP traffic is vulnerable to spoofing, access-control bypass and other unexpected behavior due to the lack of validation to verify network packets before decapsulation and routing.

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Source: MITRE

Remedy

Customers should apply the latest patch provided by the affected vendor that addresses this issue and prevents unspecified IP-in-IP packets from being processed. Devices manufacturers are urged to disable IP-in-IP in their default configuration and require their customers to explicitly configure IP-in-IP as and when needed.
First published (updated )
CVE-2020-10136

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