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TwcertVULNRICHMENT:CVE-2024-40721

HistoryAug 02, 2024 - 10:14 a.m.

CVE-2024-40721 CHANGING Information Technology TCBServiSign Windows Version - Improper Input Validation

2024-08-0210:14:39

CWE-20

twcert

github.com

cve-2024-40721

changing information technology

tcbservisign

windows version

input validation

dll loading

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.1

Confidence

High

EPSS

0.001

Percentile

38.5%

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

The specific API in TCBServiSign Windows Version from CHANGING Information Technology does not properly validate server-side input. When a user visits a spoofed website, unauthenticated remote attackers can cause the TCBServiSign to load a DLL from an arbitrary path.

CNA Affected

[
  {
    "vendor": "CHANGING Information Technology",
    "product": "TCBServiSign Windows Version",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.0.24.0318",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:changingtec:servisign:*:*:*:*:*:windows:*:*"
    ],
    "vendor": "changingtec",
    "product": "servisign",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.0.24.0318",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

References

www.twcert.org.tw/en/cp-139-7972-01a6e-2.html

www.twcert.org.tw/tw/cp-132-7966-8c6c3-1.html

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.1

Confidence

High

EPSS

0.001

Percentile

38.5%

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

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