SB2020092430 - X.509 authentication bypass in oauth-ruby
Published: September 24, 2020 Updated: May 1, 2025
Security Bulletin ID
SB2020092430
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper authentication (CVE-ID: CVE-2016-11086)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error when validation X.509 certificates in lib/oauth/consumer.rb. The library skips certificate check if the certificate bundle cannot be found on the file system. A remote attacker can bypass authentication based on X.509 certificates using a self-signed certificate.
Remediation
Install update from vendor's website.