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CVE-2017-11430— Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal

Quick assessment

Affected
OmniAuth OmnitAuth-SAML
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.

OmniAuth是一套利用Rack中间件实现的认证系统。OmniAuth-SAML是其中的一个SAML（安全断言标记语言）库。 OmniAuth OmniAuth-SAML中存在身份验证绕过漏洞。攻击者可利用该漏洞绕过身份验证机制并执行未授权的操作。以下版本受到影响：OmniAuth OmniAuth-SAML 0.9.0版本，1.0版本，1.1版本，1.2版本，1.3版本，1.4版本，1.5版本，1.6版本，1.7版本。

AI Predicted 9.1 Difficulty: Hard EPSS 2.44% · P84
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I. Basic Information for CVE-2017-11430

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
OmniAuth OmnitAuth-SAML 1.9.0 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
OmniAuth 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OmniAuth是一套利用Rack中间件实现的认证系统。OmniAuth-SAML是其中的一个SAML（安全断言标记语言）库。 OmniAuth OmniAuth-SAML中存在身份验证绕过漏洞。攻击者可利用该漏洞绕过身份验证机制并执行未授权的操作。以下版本受到影响：OmniAuth OmniAuth-SAML 0.9.0版本，1.0版本，1.1版本，1.2版本，1.3版本，1.4版本，1.5版本，1.6版本，1.7版本。
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
OmniAuth OmnitAuth-SAML unspecified ~ 1.9.0 -

II. Public POCs for CVE-2017-11430

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III. Intelligence Information for CVE-2017-11430

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Vendor Advisories for CVE-2017-11430 (1)

Security Blog Posts for CVE-2017-11430 (1)

IV. Related Vulnerabilities

Same weakness: CWE-287