CVE-2017-11427

Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal

OneLogin PythonSAML 2.3.0 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.

Affected

OneLogin · PythonSAML

CVSS v4.0 GitHub

8.3 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS v3.0 NVD

9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.0 DUO

7.7 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

4.70% chance of exploitation in the next 30 days, 92nd percentile

Published

2019-04-17

Updated

2024-08-05

Proof-of-concept exploits (2)

• https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations
• CHYbeta/CVE-2017-11427-DEMO12★ · 2018-03-03

Security advisories

• https://www.kb.cert.org/vuls/id/475445
• advisories/GHSA-j8j8-348v-wfm3

References

• CVE Record
• NVD entry

Related

• CVE-2018-1000006
• CVE-2018-11235