CVE-2023-28807

In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization	Product
https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting	Product

Configurations

Configuration 1 (hide)

cpe:2.3:a:zscaler:secure_internet_and_saas_access:*:*:*:*:*:*:*:*

History

09 Feb 2024, 16:30

Type	Values Removed	Values Added
CPE		cpe:2.3:a:zscaler:secure_internet_and_saas_access::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~5.1~~	v2 : unknown v3 : 7.5
Summary		(es) En Zscaler Internet Access (ZIA), una falta de coincidencia entre Connect Host y Client Hello's Server Name Indication (SNI) permite a los atacantes evadir los controles de seguridad de la red ocultando sus comunicaciones dentro del tráfico legítimo.
First Time		Zscaler Zscaler secure Internet And Saas Access
References	~~() https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization -~~	() https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization - Product
References	~~() https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting -~~	() https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting - Product

31 Jan 2024, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-01-31 20:15

Updated : 2024-02-09 16:30

NVD link : CVE-2023-28807

Mitre link : CVE-2023-28807

CVE.ORG link : CVE-2023-28807

JSON object : View

Products Affected

zscaler

secure_internet_and_saas_access

CWE

CWE-295

Improper Certificate Validation

{"id": "CVE-2023-28807", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "cve@zscaler.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.5}]}, "published": "2024-01-31T20:15:44.903", "references": [{"url": "https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization", "tags": ["Product"], "source": "cve@zscaler.com"}, {"url": "https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting", "tags": ["Product"], "source": "cve@zscaler.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-295"}]}, {"type": "Secondary", "source": "cve@zscaler.com", "description": [{"lang": "en", "value": "CWE-295"}]}], "descriptions": [{"lang": "en", "value": "In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic."}, {"lang": "es", "value": "En Zscaler Internet Access (ZIA), una falta de coincidencia entre Connect Host y Client Hello's Server Name Indication (SNI) permite a los atacantes evadir los controles de seguridad de la red ocultando sus comunicaciones dentro del tr\u00e1fico leg\u00edtimo."}], "lastModified": "2024-02-09T16:30:38.753", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:zscaler:secure_internet_and_saas_access:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4DC095FA-C0CB-4E6F-B749-8DB0308F9C1C", "versionEndExcluding": "6.2r.290"}], "operator": "OR"}]}], "sourceIdentifier": "cve@zscaler.com"}