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CVE-2023-42820— Random seed leakage in Jumpserver

Quick assessment

Affected
jumpserver jumpserver
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jumpserver是中国杭州飞致云信息科技有限公司的一款开源堡垒机。 JumpServer 存在信息泄露漏洞，该漏洞源于将随机数种子暴露给 API 造成的，可能会允许重放随机生成的验证码，从而导致密码重置。

CVSS 7.0 · High EPSS 6.30% · P93

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-42820

Vulnerability Information
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Vulnerability Title
Random seed leakage in Jumpserver
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Jumpserver 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jumpserver是中国杭州飞致云信息科技有限公司的一款开源堡垒机。 JumpServer 存在信息泄露漏洞，该漏洞源于将随机数种子暴露给 API 造成的，可能会允许重放随机生成的验证码，从而导致密码重置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jumpserver jumpserver >= 2.24, < 2.28.19 -

II. Public POCs for CVE-2023-42820

# POC Description Source Link Shenlong Link
1 CVE-2023-42820 https://github.com/C1ph3rX13/CVE-2023-42820 POC Details
2 JumpServer https://github.com/Startr4ck/cve-2023-42820 POC Details
3 None https://github.com/Threekiii/Awesome-POC/blob/master/%E7%BD%91%E7%BB%9C%E8%AE%BE%E5%A4%87%E6%BC%8F%E6%B4%9E/JumpServer%20%E9%9A%8F%E6%9C%BA%E6%95%B0%E7%A7%8D%E5%AD%90%E6%B3%84%E9%9C%B2%E5%AF%BC%E8%87%B4%E8%B4%A6%E6%88%B7%E5%8A%AB%E6%8C%81%E6%BC%8F%E6%B4%9E%20CVE-2023-42820.md POC Details
4 https://github.com/vulhub/vulhub/blob/master/jumpserver/CVE-2023-42820/README.md POC Details
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III. Intelligence Information for CVE-2023-42820

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Patches & Fixes for CVE-2023-42820 (1)

Vendor Advisories for CVE-2023-42820 (1)

IV. Related Vulnerabilities

Same product: jumpserver
Same vendor: jumpserver
Same weakness: CWE-200

V. Comments for CVE-2023-42820

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