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CVE-2021-38421— Fuji Electric Tellus Lite V-Simulator out of bounds read

Quick assessment

Affected
Fuji Electric V-Server Lite
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.

Fuji Electric V-Server Lite是日本Fuji Electric公司的一款用于工业环境的远程监控软件。该软件可收集PLC、温度控制器、逆变器等设备的信息。 Fuji Electric Tellus Lite V-Simulator和V-Server Lite存在缓冲区错误漏洞，该漏洞源于应用容易受到未初始化指针的访问，这可能允许攻击者读取或写入意外的内存位置，从而导致拒绝服务。

CVSS 7.8 · High EPSS 0.75% · P53

Possible ATT&CK Techniques 1 AI

T1014 · Rootkit
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I. Basic Information for CVE-2021-38421

Vulnerability Information
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Vulnerability Title
Fuji Electric Tellus Lite V-Simulator out of bounds read
Source: CVE Program / CVE List V5
Vulnerability Description
Fuji Electric V-Server Lite and Tellus Lite V-Simulator prior to v4.0.12.0 is vulnerable to an out-of-bounds read, which may allow an attacker to read sensitive information from other memory locations or cause a crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Fuji Electric V-Server Lite 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fuji Electric V-Server Lite是日本Fuji Electric公司的一款用于工业环境的远程监控软件。该软件可收集PLC、温度控制器、逆变器等设备的信息。 Fuji Electric Tellus Lite V-Simulator和V-Server Lite存在缓冲区错误漏洞，该漏洞源于应用容易受到未初始化指针的访问，这可能允许攻击者读取或写入意外的内存位置，从而导致拒绝服务。
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
Fuji Electric V-Server Lite unspecified ~ 4.0.12.0 -
Fuji Electric Tellus Lite V-Simulator unspecified ~ 4.0.12.0 -

II. Public POCs for CVE-2021-38421

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III. Intelligence Information for CVE-2021-38421

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Vendor Advisories for CVE-2021-38421 (1)

Same Patch Batch · Fuji Electric · 2021-12-20 · 6 CVEs total

CVE-2021-38401 7.8 HIGH Fuji Electric Tellus Lite V-Simulator untrusted pointer dereference
CVE-2021-38409 7.8 HIGH Fuji Electric Tellus Lite V-Simulator uninitialized pointer
CVE-2021-38413 7.8 HIGH Fuji Electric Tellus Lite V-Simulator stack based buffer overflow
CVE-2021-38415 7.8 HIGH Fuji Electric Tellus Lite V-Simulator heap based buffer overflow
CVE-2021-38419 7.8 HIGH Fuji Electric Tellus Lite V-Simulator out of bounds write

IV. Related Vulnerabilities

Same product: V-Server Lite
Same vendor: Fuji Electric
Same weakness: CWE-125

V. Comments for CVE-2021-38421

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