OneLogin SAML SSO <= 2.8.0 - Distributed Denial-of-Service
Strategic Overview
- Status
- Patched in 3.0.0
- Affected Plugin
- OneLogin SAML SSO
- Affected Version
<= 2.8.0- CVSS
- 7.5High
- Weakness type
- CWE-776 · Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
- CVE
CVE pending
At a glance
This record tracks a high-severity Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') vulnerability in the OneLogin SAML SSO WordPress plugin, affecting versions <= 2.8.0. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high availability impact). Exploitation requires no authentication. The issue is fixed in version 3.0.0; sites on affected versions should update now. Disclosed January 2019.
Vulnerability Overview
The OneLogin SAML SSO for WordPress is vulnerable to DDoS in versions up to, and including, 2.8.0. This is due to an XML Entity Expansion. This makes it possible for unauthenticated attackers to use XML External Entity to cause the vulnerable service to slow down and/or become unresponsive.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on availability.
CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.
Remediation
Update to version 3.0.0, or a newer patched version
How does WordSec protect against this?
The fix is the thing that ends this: OneLogin SAML SSO 3.0.0 closes this, and updating the plugin is the step that ends it.
- Alerts
External References
Related records
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