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.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.012 (68.2th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2018-7644: held from 0.012 to 0.012.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000

Affected products

Weakness classification (CWE)

References

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.