Vulnerability Description
JumpServer is an open source bastion host. As an unauthenticated user, it is possible to authenticate to the core API with a username and an SSH public key without needing a password or the corresponding SSH private key. An SSH public key should be considered public knowledge and should not used as an authentication secret alone. JumpServer provides an API for the KoKo component to validate user private key logins. This API does not verify the source of requests and will generate a personal authentication token. Given that public keys can be easily leaked, an attacker can exploit the leaked public key and username to authenticate, subsequently gaining access to the current user's information and authorized actions. This issue has been addressed in versions 2.28.20 and 3.7.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Fit2Cloud | Jumpserver | >= 2.0.0, < 2.28.20 |
Related Weaknesses (CWE)
References
- https://github.com/jumpserver/jumpserver/security/advisories/GHSA-fr8h-xh5x-r8g9ExploitVendor Advisory
- https://www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-intTechnical Description
- https://github.com/jumpserver/jumpserver/security/advisories/GHSA-fr8h-xh5x-r8g9ExploitVendor Advisory
FAQ
What is CVE-2023-43652?
CVE-2023-43652 is a vulnerability with a CVSS score of 8.2 (HIGH). JumpServer is an open source bastion host. As an unauthenticated user, it is possible to authenticate to the core API with a username and an SSH public key without needing a password or the correspond...
How severe is CVE-2023-43652?
CVE-2023-43652 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-43652?
Check the references section above for vendor advisories and patch information. Affected products include: Fit2Cloud Jumpserver.