Skip to content

SimpleSAMLphp Authentication context bypass in the multiauth module

High severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Apr 25, 2024

Package

composer simplesamlphp/simplesamlphp (Composer)

Affected versions

< 1.14.14

Patched versions

1.14.14

Description

The multiauth module in SimpleSAMLphp 1.14.13 and earlier allows remote attackers to bypass authentication context restrictions and use an authentication source defined in config/authsources.php via vectors related to improper validation of user input.

References

Published by the National Vulnerability Database Sep 1, 2017
Published to the GitHub Advisory Database May 14, 2022
Last updated Apr 25, 2024
Reviewed Apr 25, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.348%
(72nd percentile)

Weaknesses

CVE ID

CVE-2017-12869

GHSA ID

GHSA-qc43-78vj-vg7p

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.