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Improper Restriction of Excessive Authentication Attempts in github.com/jumpserver/coco

CVE-2023-42818

  • github.com/jumpserver/coco
  • github.com/jumpserver/jumpserver
  • github.com/jumpserver/koko
  • jumpserver/koko
High
9.8/10

Summary

JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service. This issue has been patched in versions 3.6.5 and 3.5.6. There are no known workarounds for this issue.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-307 - Improper Restriction of Excessive Authentication Attempts

The software does not implement sufficient measures to prevent multiple failed authentication attempts within in a short time frame, making it more susceptible to brute force attacks.

References

Advisory Timeline

  • Published