What is CVE-2023-42820?

CVE-2023-42820 is a vulnerability in JumpServer, an open-source bastion host, that exposes the random number seed to the API, potentially allowing replay attacks on verification codes and password resets.

How does CVE-2023-42820 affect JumpServer?

CVE-2023-42820 affects JumpServer versions 2.24.0 to 2.28.19 and versions 3.0.0 to 3.6.5.

What is the severity of CVE-2023-42820?

CVE-2023-42820 has a severity rating of 8.2, which is considered high.

Is MFA (Multi-Factor Authentication) affected by CVE-2023-42820?

No, if MFA is enabled, users are not affected by CVE-2023-42820.

What is the recommended action to fix CVE-2023-42820?

To fix CVE-2023-42820, users should update their JumpServer installation to a version higher than 2.28.19 or 3.6.5, depending on the affected version.

Vulnerability/
CVE-2023-42820

high

8.2

CWE

200

26/9/2023

23/9/2024

CVE-2023-42820: Random seed leakage in Jumpserver

First published: Tue Sep 26 2023(Updated: )

JumpServer is an open source bastion host. This vulnerability is due to exposing the random number seed to the API, potentially allowing the randomly generated verification codes to be replayed, which could lead to password resets. If MFA is enabled users are not affect. Users not using local authentication are also not affected. Users are advised to upgrade to either version 2.28.19 or to 3.6.5. There are no known workarounds or this issue.

Credit: security-advisories@github.com security-advisories@github.com

Affected Software	Affected Version	How to fix
Fit2cloud Jumpserver	>=2.24.0<2.28.19
Fit2cloud Jumpserver	>=3.0.0<3.6.5

Remedy

https://github.com/jumpserver/jumpserver/commit/42337f0d00b2a8d45ef063eb5b7deeef81597da5

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Reference Links

Frequently Asked Questions

What is CVE-2023-42820?
CVE-2023-42820 is a vulnerability in JumpServer, an open-source bastion host, that exposes the random number seed to the API, potentially allowing replay attacks on verification codes and password resets.
How does CVE-2023-42820 affect JumpServer?
CVE-2023-42820 affects JumpServer versions 2.24.0 to 2.28.19 and versions 3.0.0 to 3.6.5.
What is the severity of CVE-2023-42820?
CVE-2023-42820 has a severity rating of 8.2, which is considered high.
Is MFA (Multi-Factor Authentication) affected by CVE-2023-42820?
No, if MFA is enabled, users are not affected by CVE-2023-42820.
What is the recommended action to fix CVE-2023-42820?
To fix CVE-2023-42820, users should update their JumpServer installation to a version higher than 2.28.19 or 3.6.5, depending on the affected version.

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