CVE-2020-10136 Explained : Impact and Mitigation

Multiple products that implement the IP Encapsulation within IP standard (RFC 2003, STD 1) decapsulate and route IP-in-IP traffic without any validation, potentially allowing remote attackers to route arbitrary traffic.

Understanding CVE-2020-10136

This CVE involves a vulnerability in the decapsulation and routing of unidentified IP-in-IP traffic, enabling unauthenticated remote attackers to manipulate network traffic.

What is CVE-2020-10136?

The vulnerability allows unauthenticated remote attackers to route arbitrary traffic via an exposed network interface due to the lack of validation in handling IP-in-IP traffic.

The Impact of CVE-2020-10136

Attackers can perform spoofing and access control bypass attacks by routing arbitrary traffic through the network interface.
This vulnerability may lead to unexpected network behaviors and compromise network security.

Technical Details of CVE-2020-10136

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability arises from the lack of validation in handling IP-in-IP traffic, allowing unauthenticated remote attackers to route arbitrary traffic through the network interface.

Affected Systems and Versions

Product: RFC2003 - IP Encapsulation within IP
Vendor: IETF
Version: STD 1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: None
CVSS Score: 5.3 (Medium)

Mitigation and Prevention

Protecting systems from CVE-2020-10136 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply the latest patch provided by the affected vendor to address the vulnerability.
Block IP-in-IP packets by filtering IP protocol number 4.

Long-Term Security Practices

Disable IP-in-IP in default configurations and enable it only when necessary.

Patching and Updates

Regularly update and patch systems to ensure they are protected from known vulnerabilities.