CVEvulnerability

CVE-2017-18122

8.1 HIGH Published 2018-02-02 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-02-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
8.1 HIGH — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-347

Description

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

Affected configurations

• simplesamlphp simplesamlphp (<= 1.14.16) • debian debian linux 7.0 • debian debian linux 8.0 • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-347 Improper Verification of Cryptographic Signature weakness

References