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CVE-2021-20993— WAGO: Managed Switches: Exposure of sensitive information through directory listing

Quick assessment

Affected
WAGO 0852-0303
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.

WAGO是德国万可（WAGO）的一款750-88x系列可编程逻辑控制器。该设备专门为在工业环境下应用而设计的数字运算操作电子系统。 WAGO 存在安全漏洞。攻击者可以利用该漏洞获取程序的目录资源索引。

CVSS 5.3 · Medium EPSS 0.79% · P56

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-20993

Vulnerability Information
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Vulnerability Title
WAGO: Managed Switches: Exposure of sensitive information through directory listing
Source: CVE Program / CVE List V5
Vulnerability Description
In multiple managed switches by WAGO in different versions the activated directory listing provides an attacker with the index of the resources located inside the directory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
WAGO 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAGO是德国万可（WAGO）的一款750-88x系列可编程逻辑控制器。该设备专门为在工业环境下应用而设计的数字运算操作电子系统。 WAGO 存在安全漏洞。攻击者可以利用该漏洞获取程序的目录资源索引。
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
WAGO 0852-0303 unspecified ~ V1.2.3.S0 -
WAGO 0852-1305 unspecified ~ V1.1.7.S0 -
WAGO 0852-1505 unspecified ~ V1.1.6.S0 -
WAGO 0852-1305/000-001 unspecified ~ V1.0.4.S0 -
WAGO 0852-1505/000-001 unspecified ~ V1.0.4.S0 -

II. Public POCs for CVE-2021-20993

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III. Intelligence Information for CVE-2021-20993

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Other References for CVE-2021-20993 (1)

Same Patch Batch · WAGO · 2021-05-13 · 6 CVEs total

CVE-2021-20998 10.0 CRITICAL WAGO: Managed Switches: Unauthorized creation of user accounts
CVE-2021-20994 8.8 HIGH WAGO: Managed Switches: Reflected Cross-site Scripting
CVE-2021-20997 7.5 HIGH WAGO: Managed Switches: Unauthorized access to password hashes
CVE-2021-20995 5.3 MEDIUM WAGO: Managed Switches: Storage of user credentials in a cookie
CVE-2021-20996 5.3 MEDIUM WAGO: Managed Switches: Unsecure Cookie settings

IV. Related Vulnerabilities

Same product: 0852-0303
Same vendor: WAGO
Same weakness: CWE-200

V. Comments for CVE-2021-20993

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