CVE-2018-7750

transport.py in the SSH server implementation of Paramiko before 1.17.6, 1.18.x before 1.18.5, 2.0.x before 2.0.8, 2.1.x before 2.1.5, 2.2.x before 2.2.3, 2.3.x before 2.3.2, and 2.4.x before 2.4.1 does not properly check whether authentication is completed before processing other requests, as demonstrated by channel-open. A customized SSH client can simply skip the authentication step.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

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

V2 Legend

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/paramiko/paramiko/commit/fa29bd8446c8eab237f5187d28787727b4610516	Patch Third Party Advisory
https://github.com/paramiko/paramiko/blob/master/sites/www/changelog.rst	Third Party Advisory
https://github.com/paramiko/paramiko/issues/1175	Issue Tracking Third Party Advisory
https://usn.ubuntu.com/3603-2/	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0591	Third Party Advisory
https://usn.ubuntu.com/3603-1/	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0646	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1125	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1124	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1213	Third Party Advisory
http://www.securityfocus.com/bid/103713	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:1274	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1328	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1525	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1972	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00018.html	Mailing List Third Party Advisory
https://www.exploit-db.com/exploits/45712/	Exploit Third Party Advisory VDB Entry
https://lists.debian.org/debian-lts-announce/2021/12/msg00025.html	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:paramiko:paramiko::::::::
	cpe:2.3:a:paramiko:paramiko::::::::
	cpe:2.3:a:paramiko:paramiko::::::::
	cpe:2.3:a:paramiko:paramiko::::::::
	cpe:2.3:a:paramiko:paramiko::::::::
	cpe:2.3:a:paramiko:paramiko:2.4.0:::::::*
	cpe:2.3:a:paramiko:paramiko::::::::

Configuration 2 (hide)

OR	cpe:2.3:a:redhat:ansible_engine:2.0:::::::*
	cpe:2.3:a:redhat:ansible_engine:2.4:::::::*
	cpe:2.3:a:redhat:cloudforms:4.5:::::::*
	cpe:2.3:a:redhat:cloudforms:4.6:::::::*
	cpe:2.3:a:redhat:virtualization:4.1:::::::*
	cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_eus:6.7:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_tus:6.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

Information

Published : 2018-03-13 11:29

Updated : 2022-04-18 10:30

NVD link : CVE-2018-7750

Mitre link : CVE-2018-7750

JSON object : View

CWE

CWE-287

Improper Authentication

Products Affected

redhat

ansible_engine
enterprise_linux_desktop
enterprise_linux_server_aus
enterprise_linux_workstation
virtualization
enterprise_linux_server_tus
cloudforms
enterprise_linux_server_eus
enterprise_linux_server

paramiko

paramiko

debian

debian_linux

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A customized SSH client can simply skip the authentication step."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-287"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-7750", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"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"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2018-03-13T18:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "1.17.6"}, {"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.0.8", "versionStartIncluding": "2.0.0"}, {"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.1.5", "versionStartIncluding": "2.1.0"}, {"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.2.3", "versionStartIncluding": "2.2.0"}, {"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.3.2", "versionStartIncluding": "2.3.0"}, {"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:2.4.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "1.18.5", "versionStartIncluding": "1.18.0"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:redhat:ansible_engine:2.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:redhat:ansible_engine:2.4:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:redhat:cloudforms:4.5:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:redhat:virtualization:4.1:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_eus:6.7:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_tus:6.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-04-18T17:30Z"}

9.8 /10