What is CVE-2018-7644?

CVE-2018-7644 is a high-severity vulnerability in Simplesamlphp, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2018-03-05.

How severe is CVE-2018-7644?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Simplesamlphp

CVE-2018-7644

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.

EPSS: 0.013 (66.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Simplesamlphp
N/a — versions n/a

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2018-7644?: CVE-2018-7644 is a high-severity vulnerability in Simplesamlphp, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2018-03-05.
How severe is CVE-2018-7644?: High severity. CVSS v3 base score is 7.5 out of 10.