CVE-2023-42818

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv	Exploit Vendor Advisory
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:fit2cloud:jumpserver::::::::
	cpe:2.3:a:fit2cloud:jumpserver::::::::

History

21 Nov 2024, 08:23

Type	Values Removed	Values Added
References	~~() https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv - Exploit, Vendor Advisory~~	() https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv - Exploit, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~9.8~~	v2 : unknown v3 : 5.4

02 Oct 2023, 19:59

Type	Values Removed	Values Added
CWE	~~CWE-287~~	CWE-307
References	~~(MISC) https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv -~~	(MISC) https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv - Exploit, Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
CPE		cpe:2.3:a:fit2cloud:jumpserver::::::::
First Time		Fit2cloud Fit2cloud jumpserver

27 Sep 2023, 21:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-09-27 21:15

Updated : 2024-11-21 08:23

NVD link : CVE-2023-42818

Mitre link : CVE-2023-42818

CVE.ORG link : CVE-2023-42818

JSON object : View

Products Affected

fit2cloud

jumpserver

CWE

CWE-287

Improper Authentication

CWE-307

Improper Restriction of Excessive Authentication Attempts

{"id": "CVE-2023-42818", "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 2.5, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2023-09-27T21:15:10.173", "references": [{"url": "https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv", "tags": ["Exploit", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-307"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "JumpServer es un host de bastionado de c\u00f3digo abierto. Cuando los usuarios habilitan MFA y usan una clave p\u00fablica para la autenticaci\u00f3n, el servidor Koko SSH no verifica la clave privada SSH correspondiente. Un atacante podr\u00eda aprovechar la vulnerabilidad utilizando una clave p\u00fablica revelada para intentar la autenticaci\u00f3n de fuerza bruta contra el servicio SSH. Este problema se solucion\u00f3 en las versiones 3.6.5 y 3.5.6. Se recomienda a los usuarios que actualicen. No se conocen workarounds para este problema."}], "lastModified": "2024-11-21T08:23:16.650", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1DA8A350-8CAA-4711-BCB6-23A2D61A2892", "versionEndExcluding": "3.5.6"}, {"criteria": "cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "86D1D7DB-C7D0-4B17-8C3A-584EA152E424", "versionEndExcluding": "3.6.5", "versionStartIncluding": "3.6.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}