CVE-2018-7340

Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Duo Network Gateway versión 1.2.9 y anteriores pueden utilizar incorrectamente los resultados de las API de transversalidad y canonicalización de DOM de XML de tal manera que un atacante pueda manipular los datos SAML sin invalidar la firma criptográfica, lo que permite que el ataque omita la identificación a los proveedores de servicio de SAML.

*Credits: Kelby Ludwig of Duo Security

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-02-22 CVE Reserved
2019-04-17 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-287: Improper Authentication
CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (2)

URL	Tag	Source
https://www.kb.cert.org/vuls/id/475445	Third Party Advisory

URL	Date	SRC
https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Duo Network Gateway Search vendor "Cisco" for product "Duo Network Gateway"				<= 1.2.9 Search vendor "Cisco" for product "Duo Network Gateway" and version " <= 1.2.9"		-		Affected