CVE-2021-28503

The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI.

CVSS v3 7.4 HIGH
CVSS v2.0 6.8 MEDIUM

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072	Mitigation Patch Vendor Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:arista:eos::::::::
	cpe:2.3:o:arista:eos::::::::
	cpe:2.3:o:arista:eos::::::::
	cpe:2.3:o:arista:eos::::::::
	cpe:2.3:o:arista:eos::::::::

History

21 Nov 2024, 05:59

Type	Values Removed	Values Added
CVSS	v2 : ~~6.8~~ v3 : ~~9.8~~	v2 : 6.8 v3 : 7.4
References	~~() https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072 - Mitigation, Patch, Vendor Advisory~~	() https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072 - Mitigation, Patch, Vendor Advisory

Information

Published : 2022-02-04 23:15

Updated : 2024-11-21 05:59

NVD link : CVE-2021-28503

Mitre link : CVE-2021-28503

CVE.ORG link : CVE-2021-28503

JSON object : View

Products Affected

arista

eos

CWE

CWE-305

Authentication Bypass by Primary Weakness

CWE-287

Improper Authentication

{"id": "CVE-2021-28503", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@arista.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 2.2}, {"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": "2022-02-04T23:15:11.350", "references": [{"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "source": "psirt@arista.com"}, {"url": "https://www.arista.com/en/support/advisories-notices/security-advisories/13605-security-advisory-0072", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "psirt@arista.com", "description": [{"lang": "en", "value": "CWE-305"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-287"}]}], "descriptions": [{"lang": "en", "value": "The impact of this vulnerability is that Arista's EOS eAPI may skip re-evaluating user credentials when certificate based authentication is used, which allows remote attackers to access the device via eAPI."}, {"lang": "es", "value": "El impacto de esta vulnerabilidad es que EOS eAPI de Arista puede omitir la reevaluaci\u00f3n de las credenciales del usuario cuando es usada la autenticaci\u00f3n basada en certificados, lo que permite a atacantes remotos acceder al dispositivo por medio de eAPI"}], "lastModified": "2024-11-21T05:59:47.697", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C48331B8-808D-4080-BD74-2DC93014D10C", "versionEndIncluding": "4.22.9m", "versionStartIncluding": "4.22"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A3310AD8-03C5-4018-A49B-C3527B9C2ADB", "versionEndIncluding": "4.23.9", "versionStartIncluding": "4.23"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AFB2FFFE-6E99-4222-B3F4-854B5A4B8B0A", "versionEndIncluding": "4.24.7", "versionStartIncluding": "4.24"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E004CBA8-2859-4098-948B-2F5D0DD5EBA5", "versionEndIncluding": "4.25.5", "versionStartIncluding": "4.25"}, {"criteria": "cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "06AA619C-3D2F-41FC-A3F1-0080F57A8F09", "versionEndIncluding": "4.26.2", "versionStartIncluding": "4.26"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@arista.com"}