Name: CVE-2018-7644: Improper Verification of Cryptographic Signature
Creator: Rapid7
Published: 2018-03-05T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2018-7644, CWE-347, CVSS 7.5, EPSS 0.00166

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade simplesamlphp	Feb 19, 2019	Mar 5, 2018
Ubuntu	—	No solution exists	Jun 26, 2025	Mar 5, 2018

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CVSS Details

Covered by Rapid7

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