7.5high
CVE-2018-7644
SimpleSAMLphp Improper Verification of Cryptographic Signature
Also known as GHSA-923w-2xv2-7pr8
Published 8 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.5%
percentile 73%
Public exploits
0
none known
Summary
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.
Exploit prediction (EPSS)
1.45% probability of exploitation in the next 30 days, higher than 73% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| packagist | simplesamlphp/saml2 | <1.10.5 >=2.0, <2.3.7 >=3.0, <3.1.3 | 1.10.5 2.3.7 3.1.3 |
Classification
- Weakness
- CWE-347 Improper Verification of Cryptographic Signature
References
- simplesamlphp.org /security/201802-01 · x_refsource_CONFIRM, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2018-7644 · advisory
- github.com /FriendsOfPHP/security-advisories/blob/master/simplesamlphp/saml2/CVE-2018-7644.yaml · web
- github.com /simplesamlphp/simplesamlphp · package
Sources
- CVE List: CVE-2018-7644
- GitHub Advisory: GHSA-923w-2xv2-7pr8
- NVD: CVE-2018-7644
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