CVE-2018-7644
SimpleSAMLphp Improper Verification of Cryptographic Signature
7.5
HIGH
CVSS 3.1
EPSS 0.21%
Description
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.
How to fix CVE-2018-7644
To remediate CVE-2018-7644, upgrade the affected package to a fixed version below.
- —upgrade to 1.15.3-1 or later
- —upgrade to 1.10.5 or later
Is CVE-2018-7644 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.15.3-1
- from 0, < 1.10.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |