GSD-2023-28807
Vulnerability from gsd - Updated: 2023-12-13 01:20Details
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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2023-28807",
"id": "GSD-2023-28807"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2023-28807"
],
"details": "In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello\u0027s Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.",
"id": "GSD-2023-28807",
"modified": "2023-12-13T01:20:48.460590Z",
"schema_version": "1.4.0"
}
},
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"STATE": "PUBLIC"
},
"affects": {
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{
"product": {
"product_data": [
{
"product_name": "ZIA",
"version": {
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"version_affected": "\u003c",
"version_name": "0",
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}
]
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]
},
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}
]
}
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"credits": [
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"value": "Citi Red Team"
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"description": {
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"value": "In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello\u0027s Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic."
}
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},
"generator": {
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"impact": {
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"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
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"problemtype": {
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"description": [
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"cweId": "CWE-295",
"lang": "eng",
"value": "CWE-295 Improper Certificate Validation"
}
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"references": {
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{
"name": "https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting",
"refsource": "MISC",
"url": "https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting"
},
{
"name": "https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization",
"refsource": "MISC",
"url": "https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization"
}
]
},
"source": {
"discovery": "UNKNOWN"
}
},
"nvd.nist.gov": {
"cve": {
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"versionEndExcluding": "6.2r.290",
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"descriptions": [
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"value": "In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello\u0027s 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\u0027s 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."
}
],
"id": "CVE-2023-28807",
"lastModified": "2024-02-09T16:30:38.753",
"metrics": {
"cvssMetricV31": [
{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
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"source": "nvd@nist.gov",
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{
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"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.5,
"impactScore": 2.5,
"source": "cve@zscaler.com",
"type": "Secondary"
}
]
},
"published": "2024-01-31T20:15:44.903",
"references": [
{
"source": "cve@zscaler.com",
"tags": [
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],
"url": "https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization"
},
{
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"tags": [
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"url": "https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting"
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"sourceIdentifier": "cve@zscaler.com",
"vulnStatus": "Analyzed",
"weaknesses": [
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"type": "Secondary"
}
]
}
}
}
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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