CVE-2023-43650: Non-MFA account takeover via brute-force attack on weak password reset code in jumpserver
First published: Wed Sep 27 2023(Updated: )
JumpServer is an open source bastion host. The verification code for resetting user's password is vulnerable to brute-force attacks due to the absence of rate limiting. JumpServer provides a feature allowing users to reset forgotten passwords. Affected users are sent a 6-digit verification code, ranging from 000000 to 999999, to facilitate the password reset. Although the code is only available in 1 minute, this window potentially allows for up to 1,000,000 validation attempts. 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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Fit2cloud Jumpserver | >=2.0.0<2.28.20 | |
| Fit2cloud Jumpserver | >=3.0.0<3.7.1 |
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Frequently Asked Questions
What is CVE-2023-43650?
CVE-2023-43650 is a vulnerability in JumpServer, an open source bastion host, that allows brute-force attacks on the verification code used to reset user's passwords.
How does CVE-2023-43650 affect JumpServer?
CVE-2023-43650 affects JumpServer versions between 2.0.0 and 2.28.20, as well as versions between 3.0.0 and 3.7.1, making the verification code for resetting passwords vulnerable to brute-force attacks.
What is the severity of CVE-2023-43650?
CVE-2023-43650 has a severity score of 7.4 (high severity).
How can I fix CVE-2023-43650?
To fix CVE-2023-43650, update JumpServer to a version that includes rate limiting for the password reset verification code.
Where can I find more information about CVE-2023-43650?
You can find more information about CVE-2023-43650 in the official GitHub advisory: [link](https://github.com/jumpserver/jumpserver/security/advisories/GHSA-mwx4-8fwc-2xvw).
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- version/fit2cloud jumpserver/3.0.0