CVE-2018-7340 : What You Need to Know

Duo Network Gateway versions prior to 1.2.9 have a vulnerability that could allow attackers to manipulate SAML data, potentially bypassing authentication to SAML service providers.

Understanding CVE-2018-7340

This CVE involves a security vulnerability in the way Duo Network Gateway handles XML DOM traversal and canonicalization APIs.

What is CVE-2018-7340?

Versions before 1.2.9 of Duo Network Gateway are susceptible to exploitation, enabling attackers to tamper with SAML data without compromising the cryptographic signature, potentially leading to authentication bypass.

The Impact of CVE-2018-7340

The vulnerability poses a high severity risk with a CVSS base score of 7.7, affecting confidentiality and potentially allowing unauthorized access to SAML service providers.

Technical Details of CVE-2018-7340

Duo Network Gateway 1.2.9 and earlier are affected by this vulnerability.

Vulnerability Description

The flaw allows attackers to manipulate SAML data without invalidating the cryptographic signature, potentially bypassing authentication to SAML service providers.

Affected Systems and Versions

Product: Duo Network Gateway
Vendor: Duo Security
Versions Affected: < 1.2.9

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Scope: Changed

Mitigation and Prevention

To address CVE-2018-7340, follow these steps:

Immediate Steps to Take

Update Duo Network Gateway to version 1.2.9 or newer.
Monitor for any unauthorized access or suspicious activities.

Long-Term Security Practices

Regularly review and update security configurations.
Conduct security assessments and audits periodically.

Patching and Updates

Stay informed about security patches and updates from Duo Security.