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CVE-2020-3926— ServiSign Windows Versions- Arbitrary File Access

Quick assessment

Affected
CHANGING ServiSign Windows versions
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.

Changingtec ServiSign是中国台湾全景软件（Changingtec）公司的一个系统。该系统提供了数字签名和验证的跨平台解决方案。 Changingtec ServiSign security plugin 中存在安全漏洞。攻击者可借助特制的API参数利用该漏洞访问目标系统上的任意文件。

CVSS 6.1 · Medium EPSS 1.48% · P74
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I. Basic Information for CVE-2020-3926

Vulnerability Information
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Vulnerability Title
ServiSign Windows Versions- Arbitrary File Access
Source: CVE Program / CVE List V5
Vulnerability Description
An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Changingtec ServiSign security plugin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Changingtec ServiSign是中国台湾全景软件（Changingtec）公司的一个系统。该系统提供了数字签名和验证的跨平台解决方案。 Changingtec ServiSign security plugin 中存在安全漏洞。攻击者可借助特制的API参数利用该漏洞访问目标系统上的任意文件。
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 ServiSign Windows versions 0 ~ 1.0.19.0617 -

II. Public POCs for CVE-2020-3926

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III. Intelligence Information for CVE-2020-3926

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Other References for CVE-2020-3926 (2)

Same Patch Batch · CHANGING · 2020-02-03 · 3 CVEs total

CVE-2020-3925 8.3 HIGH ServiSign Windows Versions- Remote Code Execution via LoadLibrary
CVE-2020-3927 8.3 HIGH ServiSign Windows Versions- Arbitrary File Deletion

IV. Related Vulnerabilities

Same product: ServiSign Windows versions
Same vendor: CHANGING

V. Comments for CVE-2020-3926

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