Random seed leakage in Jumpserver
CVE-2023-42820

7HIGH

Key Information:

Vendor

Jumpserver

Status
Jumpserver
Vendor
CVE Published:
27 September 2023

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-42820?

An API vulnerability in JumpServer exposes the random number seed, allowing potential replay attacks on verification codes, which may compromise account authentication. Users with Multi-Factor Authentication (MFA) activated or those not utilizing local authentication are not affected. It is crucial for users to upgrade to the latest versions (2.28.19 or 3.6.5) to mitigate this risk, as there are currently no workarounds offered for this vulnerability.

Affected Version(s)

jumpserver >= 2.24, < 2.28.19 < 2.24, 2.28.19

jumpserver >= 3.0.0, < 3.6.5 < 3.0.0, 3.6.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-42820
Created by C1ph3rX13

cve-2023-42820
Created by Startr4ck

References

https://github.com/jumpserver/jumpserver/security/advisor...
x_refsource_CONFIRM
https://github.com/jumpserver/jumpserver/commit/42337f0d0...
x_refsource_MISC

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.