CVE Vulnerability

CVE-2021-27736

FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xml.parsers.DocumentBuilderFactory unsafely.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.compass-security.com/fileadmin/Research/Advisories/2021-03_CSNC-2021-004_FusionAuth_SAML_Library_XML_External_Entity.txt Exploit Third Party Advisory
https://github.com/FusionAuth/fusionauth-samlv2/compare/0.5.3...0.5.4 Patch Third Party Advisory
https://github.com/FusionAuth/fusionauth-samlv2/commit/c66fb689d50010662f705d5b585c6388ce555dbd Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:fusionauth:saml_v2:*:*:*:*:*:*:*:*
Information

Published : 2021-04-22 02:15

Updated : 2021-04-27 05:23

NVD link : CVE-2021-27736

Mitre link : CVE-2021-27736

Products Affected
No products.
CWE
CWE-611

Improper Restriction of XML External Entity Reference