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ZscalerVULNRICHMENT:CVE-2023-28806

HistoryAug 06, 2024 - 3:41 p.m.

CVE-2023-28806 Signature validation error in DLL allows disabling anti-tampering protection

2024-08-0615:41:01

CWE-347

Zscaler

github.com

cve-2023-28806

dll

zscaler client connector

windows

signature validation error

anti-tampering protection

authentication bypass

CVSS3

5.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

AI Score

Confidence

High

EPSS

0.001

Percentile

16.8%

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering. This issue affects Client Connector on Windows <4.2.0.190.

CNA Affected

[
  {
    "vendor": "Zscaler",
    "product": "Client Connector",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "4.2.0.190",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "Windows"
    ],
    "defaultStatus": "unaffected"
  }
]

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:windows:*:*"
    ],
    "vendor": "zscaler",
    "product": "client_connector",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "4.2.0.190",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

References

help.zscaler.com/client-connector/client-connector-app-release-summary-2023?applicable_category=windows&applicable_version=4.2.0.190

CVSS3

5.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

AI Score

Confidence

High

EPSS

0.001

Percentile

16.8%

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

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