CVE-2023-28807 (GCVE-0-2023-28807)
Vulnerability from cvelistv5
Published
2024-01-31 19:16
Modified
2025-06-17 21:29
CWE
  • CWE-295 - Improper Certificate Validation
Summary
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.
Impacted products
Vendor Product Version
Zscaler ZIA Version: 0   < 6.2r.290
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T13:51:38.890Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-28807",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-14T21:06:39.806468Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-17T21:29:19.136Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "ZIA",
          "vendor": "Zscaler",
          "versions": [
            {
              "lessThan": "6.2r.290",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "user": "00000000-0000-4000-9000-000000000000",
          "value": "Citi Red Team"
        }
      ],
      "datePublic": "2024-02-01T02:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "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."
            }
          ],
          "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-554",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-554 Functionality Bypass"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "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"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-295",
              "description": "CWE-295 Improper Certificate Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-31T19:17:15.685Z",
        "orgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
        "shortName": "Zscaler"
      },
      "references": [
        {
          "url": "https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting"
        },
        {
          "url": "https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Bypass of ZIA domain fronting detection module through evasion technique",
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
    "assignerShortName": "Zscaler",
    "cveId": "CVE-2023-28807",
    "datePublished": "2024-01-31T19:16:59.806Z",
    "dateReserved": "2023-03-23T18:29:15.803Z",
    "dateUpdated": "2025-06-17T21:29:19.136Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-28807\",\"sourceIdentifier\":\"cve@zscaler.com\",\"published\":\"2024-01-31T20:15:44.903\",\"lastModified\":\"2024-11-21T07:56:03.310\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@zscaler.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":5.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.5,\"impactScore\":2.5},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"cve@zscaler.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:zscaler:secure_internet_and_saas_access:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.2r.290\",\"matchCriteriaId\":\"4DC095FA-C0CB-4E6F-B749-8DB0308F9C1C\"}]}]}],\"references\":[{\"url\":\"https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization\",\"source\":\"cve@zscaler.com\",\"tags\":[\"Product\"]},{\"url\":\"https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting\",\"source\":\"cve@zscaler.com\",\"tags\":[\"Product\"]},{\"url\":\"https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Product\"]},{\"url\":\"https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Product\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T13:51:38.890Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-28807\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-14T21:06:39.806468Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-06-17T21:22:54.370Z\"}}], \"cna\": {\"title\": \"Bypass of ZIA domain fronting detection module through evasion technique\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"user\": \"00000000-0000-4000-9000-000000000000\", \"value\": \"Citi Red Team\"}], \"impacts\": [{\"capecId\": \"CAPEC-554\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-554 Functionality Bypass\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"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\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Zscaler\", \"product\": \"ZIA\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"6.2r.290\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2024-02-01T02:00:00.000Z\", \"references\": [{\"url\": \"https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting\"}, {\"url\": \"https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"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.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-295\", \"description\": \"CWE-295 Improper Certificate Validation\"}]}], \"providerMetadata\": {\"orgId\": \"73c6f63b-efac-410d-a0a9-569700f85a04\", \"shortName\": \"Zscaler\", \"dateUpdated\": \"2024-01-31T19:17:15.685Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-28807\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-06-17T21:29:19.136Z\", \"dateReserved\": \"2023-03-23T18:29:15.803Z\", \"assignerOrgId\": \"73c6f63b-efac-410d-a0a9-569700f85a04\", \"datePublished\": \"2024-01-31T19:16:59.806Z\", \"assignerShortName\": \"Zscaler\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…