JumpServer up to 3.5.5/3.6.4 SSH Private Key improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in JumpServer up to 3.5.5/3.6.4. This affects an unknown part of the component SSH Private Key Handler. Performing a manipulation results in improper authentication. This vulnerability is cataloged as CVE-2023-42818. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in JumpServer up to 3.5.5/3.6.4. This affects an unknown functionality of the component SSH Private Key Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.

The weakness was shared 09/28/2023 as GHSA-jv3c-27cv-w8jv. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2023-42818 since 09/14/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 3.5.6 or 3.6.5 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 5.4
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: JumpServer 3.5.6/3.6.5

Timelineinfo

09/14/2023 🔍
09/28/2023 +14 days 🔍
09/28/2023 +0 days 🔍
03/25/2025 +544 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-jv3c-27cv-w8jv
Status: Confirmed

CVE: CVE-2023-42818 (🔍)
GCVE (CVE): GCVE-0-2023-42818
GCVE (VulDB): GCVE-100-240759

Entryinfo

Created: 09/28/2023 07:23
Updated: 03/25/2025 23:14
Changes: 09/28/2023 07:23 (50), 10/21/2023 11:25 (11), 03/25/2025 23:14 (16)
Complete: 🔍
Cache ID: 216::103

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