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TwcertVULNRICHMENT:CVE-2024-40720

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

CVE-2024-40720 CHANGING Information Technology TCBServiSign Windows Version - Improper Input Validation

2024-08-0210:10:16

CWE-20

twcert

github.com

cve-2024-40720

tcbservisign

input validation

changing information technology

spoofed website

remote attackers

arbitrary commands

hkey_current_user

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

7.7

Confidence

High

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 modify the HKEY_CURRENT_USER registry to execute arbitrary commands.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:changinginformationtechnology:tcbservisign:*:*:*:*:*:*:*:*"
    ],
    "vendor": "changinginformationtechnology",
    "product": "tcbservisign",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "1.0.24.0318",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]

References

www.twcert.org.tw/en/cp-139-7971-d9584-2.html

www.twcert.org.tw/tw/cp-132-7965-8285d-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

7.7

Confidence

High

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

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