CVE-2021-3196 Information

Description

An issue was discovered in Hitachi ID Bravura Security Fabric 11.0.0 through 11.1.3 12.0.0 through 12.0.2 and 12.1.0. When using federated identity management (authenticating via SAML through a third-party identity provider) an attacker can inject additional data into a signed SAML response being transmitted to the service provider (ID Bravura Security Fabric). The application successfully validates the signed values but uses the unsigned malicious values. An attacker with lower-privilege access to the application can inject the username of a high-privilege user to impersonate that user.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://www.hitachi.com/hirt/security/index.html https://www.hitachi-id.com/cve-2021-3196-attackers-can-impersonate-another-user https://www.hitachi.com/hirt/hitachi-sec/2021/601.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8