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CVE-2021-37909— CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation

Quick assessment

Affected
CHANGING Inc. TSSServiSignAdapter
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

台信证券股份有限公司 TssServiSignAdapter（全景TSSServiSignAdapter Windows版本）是中国台信证券股份有限公司公司的 TssServiSignAdapter Windows版本1.0.20.0316及以下版本存在输入验证错误漏洞，该漏洞源于TSSServiSign组件中的WriteRegistry函数没有过滤和验证用户输入，远程攻击者可利用该漏洞可以在没有权限的情况下重写注册表，从而执行劫持攻击来执行任意代码。

CVSS 9.8 · Critical EPSS 2.01% · P80
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I. Basic Information for CVE-2021-37909

Vulnerability Information
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Vulnerability Title
CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation
Source: CVE Program / CVE List V5
Vulnerability Description
WriteRegistry function in TSSServiSign component does not filter and verify users’ input, remote attackers can rewrite to the registry without permissions thus perform hijack attacks to execute arbitrary code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TssServiSignAdapter 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
台信证券股份有限公司 TssServiSignAdapter（全景TSSServiSignAdapter Windows版本）是中国台信证券股份有限公司公司的 TssServiSignAdapter Windows版本1.0.20.0316及以下版本存在输入验证错误漏洞，该漏洞源于TSSServiSign组件中的WriteRegistry函数没有过滤和验证用户输入，远程攻击者可利用该漏洞可以在没有权限的情况下重写注册表，从而执行劫持攻击来执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
CHANGING Inc. TSSServiSignAdapter unspecified ~ 1.0.20.0316 -

II. Public POCs for CVE-2021-37909

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III. Intelligence Information for CVE-2021-37909

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IV. Related Vulnerabilities

Same vendor: CHANGING Inc.
Same weakness: CWE-20

V. Comments for CVE-2021-37909

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