CVE-2017-11428 json
Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal
published 2019-04-17 7 y ago modified 2026-06-17 4 mo ago also GHSA-x2fr-v8wf-8wwv , EUVD-2019-0609
- cvss
- 7.7
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.5%
- EPSS 2.5% chance of exploitation in 30 days, percentile 84%
- public exploits
- 0
- none known
Summary
OneLogin Ruby-SAML 1.6.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
Patch / fix
- rubygems ruby-saml 1.7.0
- OneLogin Ruby-SAML 1.6.0
- ruby-saml Debian 12 1.7.2-1
debian advisories DEBIAN-CVE-2017-11428
- ruby-saml Ubuntu Pro 16.04 LTS 1.1.2-1ubuntu1+esm1
ubuntu advisories UBUNTU-CVE-2017-11428
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
2.46% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- duo.com https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.7 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 7.7 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| rubygems | ruby-saml | <1.7.0 |
1.7.0 |
Affected products
- OneLogin Ruby-SAML
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
duo.com
/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations
web, exploit, technical-description, third-party-advisory
-
kb.cert.org
/vuls/id/475445
web, third-party-advisory, us-government-resource
-
nvd.nist.gov
/vuln/detail/CVE-2017-11428
advisory
Sources
- CVE List CVE-2017-11428
- GitHub Advisory GHSA-x2fr-v8wf-8wwv
- NVD CVE-2017-11428
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.