CVE-2018-7749

The SSH server implementation of AsyncSSH before 1.12.1 does not properly check whether authentication is completed before processing other requests. A customized SSH client can simply skip the authentication step.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/ronf/asyncssh/commit/c161e26cdc0d41b745b63d9f17b437f073bf7ba4	Third Party Advisory
https://groups.google.com/forum/#%21msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ

Configurations

Configuration 1 (hide)

cpe:2.3:a:asyncssh_project:asyncssh:*:*:*:*:*:*:*:*

History

07 Nov 2023, 03:01

Type	Values Removed	Values Added
References	{'url': 'https://groups.google.com/forum/#!msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ', 'name': '[asyncssh-announce] 20180310 AsyncSSH 1.12.1 released, with important security fix!', 'tags': ['Vendor Advisory'], 'refsource': 'MLIST'}	() https://groups.google.com/forum/#%21msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ -

Information

Published : 2018-03-12 19:29

Updated : 2023-12-10 12:30

NVD link : CVE-2018-7749

Mitre link : CVE-2018-7749

CVE.ORG link : CVE-2018-7749

JSON object : View

Products Affected

asyncssh_project

asyncssh

CWE

CWE-287

Improper Authentication

{"id": "CVE-2018-7749", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/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": "2018-03-12T19:29:00.207", "references": [{"url": "https://github.com/ronf/asyncssh/commit/c161e26cdc0d41b745b63d9f17b437f073bf7ba4", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://groups.google.com/forum/#%21msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ", "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-287"}]}], "descriptions": [{"lang": "en", "value": "The SSH server implementation of AsyncSSH before 1.12.1 does not properly check whether authentication is completed before processing other requests. A customized SSH client can simply skip the authentication step."}, {"lang": "es", "value": "La implementaci\u00f3n del servidor SSH en AsyncSSH, en versiones anteriores a la 1.12.1, no comprueba adecuadamente si la autenticaci\u00f3n se completa antes de procesar otras peticiones. Un cliente SSH personalizado puede simplemente omitir el paso de autenticaci\u00f3n."}], "lastModified": "2023-11-07T03:01:10.237", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:asyncssh_project:asyncssh:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9909F21E-2C0C-46A8-961C-01564802EB9F", "versionEndExcluding": "1.12.1"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}