What’s Vulnerable › Vulnerabilities

CVE-2017-18076

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-01-26 · updated 2026-06-17

Description

In strategy.rb in OmniAuth before 1.3.2, the authenticity_token value is improperly protected because POST (in addition to GET) parameters are stored in the session and become available in the environment of the callback phase.

Affected products

• Debian Linux: 8.0, 9.0
• omniauth ruby gem: before 1.3.2 — fixed in 1.3.2

How to fix

Upgrade to a fixed version: omniauth ruby gem 1.3.2. Check the vendor advisory for mitigations.

References

• https://bugs.debian.org/888523
• https://github.com/omniauth/omniauth/pull/867
• https://github.com/omniauth/omniauth/pull/867/commits/71866c5264122e196847a3980c43051446a03e9b
• https://www.debian.org/security/2018/dsa-4109
• https://bugs.debian.org/888523
• https://github.com/omniauth/omniauth/pull/867
• https://github.com/omniauth/omniauth/pull/867/commits/71866c5264122e196847a3980c43051446a03e9b
• https://www.debian.org/security/2018/dsa-4109

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