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CVE-2018-7340— Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal

Quick assessment

Affected
Duo Security Duo Network Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Duo Network Gateway（DNG）是美国Duo公司的一款用于访问内部Web应用程序的访问控制软件。 DNG 1.2.10之前的版本中存在身份验证绕过漏洞。远程攻击者可利用该漏洞绕过身份验证机制，执行未授权的操作。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.94% · P61
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I. Basic Information for CVE-2018-7340

Vulnerability Information
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Vulnerability Title
Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal
Source: CVE Program / CVE List V5
Vulnerability Description
Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Duo Network Gateway 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Duo Network Gateway（DNG）是美国Duo公司的一款用于访问内部Web应用程序的访问控制软件。 DNG 1.2.10之前的版本中存在身份验证绕过漏洞。远程攻击者可利用该漏洞绕过身份验证机制，执行未授权的操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Duo Security Duo Network Gateway unspecified ~ 1.2.9 -

II. Public POCs for CVE-2018-7340

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III. Intelligence Information for CVE-2018-7340

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Vendor Advisories for CVE-2018-7340 (1)

Security Blog Posts for CVE-2018-7340 (1)

IV. Related Vulnerabilities

Same weakness: CWE-287