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Improper Authentication

CVE-2024-47070

High
9/10

Summary

The authentik Go module is an open-source identity provider. A vulnerability that exists in github.com/goauthentik/authentik package versions prior to 2024.6.5 and 2024.8.x prior to 2024.8.3, allows bypassing password login by adding "X-Forwarded-For" header with an unparsable IP address, e.g. `a`. This results in a possibility of logging into any account with a known login or email address. The vulnerability requires the authentik instance to trust "X-Forwarded-For" header provided by the attacker, thus it is not reproducible from external hosts on a properly configured environment. The issue occurs due to the password stage having a policy bound to it, which skips the password stage if the Identification stage is set up to also contain a password stage. Due to the invalid "X-Forwarded-For" header, which does not get validated to be an IP Address early enough, the exception happens later and the policy fails. The default blueprint doesn't correctly set "failure_result" to "True" on the policy binding, meaning that due to this exception, the policy returns false, and the password stage is skipped.

  • HIGH
  • NETWORK
  • HIGH
  • CHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-287 - Improper Authentication

Improper (or broken) authentication attacks are widespread, and have accounted for many of the worst data breaches in recent years. Improper authentication attacks are a class of vulnerabilities where an attacker impersonates a legitimate user by exploiting weaknesses in either session management or credential management to gain access to the user’s account. This can result in disclosure of sensitive information, and can lead to system compromise, theft, identity theft, and fraud.

References

Advisory Timeline

  • Published