Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-34567— WAGO I/O-Check Service prone to Out-of-bounds Read

Quick assessment

Affected
WAGO 750-81xx/xxx-xxxFW
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）公司的一款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 I/O-Check Service存在缓冲区错误漏洞，该漏洞源于未经身份验证的远程攻击者可以发送包含操作系统命令的特制数据包，以引发拒绝服务和有限的越界读取。

CVSS 8.2 · High EPSS 0.86% · P59
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-34567

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
WAGO I/O-Check Service prone to Out-of-bounds Read
Source: CVE Program / CVE List V5
Vulnerability Description
In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service and an limited out-of-bounds read.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
WAGO 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAGO是德国万可（WAGO）公司的一款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 I/O-Check Service存在缓冲区错误漏洞，该漏洞源于未经身份验证的远程攻击者可以发送包含操作系统命令的特制数据包，以引发拒绝服务和有限的越界读取。
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 750-81xx/xxx-xxxFW FW1 ~ FW18 Patch 2 -
WAGO 750-82xx/xxx-xxx FW1 ~ FW18 Patch 2 -
WAGO 752-8303/8000-0002 FW1 ~ FW18 Patch 2 -
WAGO 762-4xxx FW1 ~ FW18 Patch 2 -
WAGO 762-5xxx FW1 ~ FW18 Patch 2 -
WAGO 762-6xxx FW1 ~ FW18 Patch 2 -

II. Public POCs for CVE-2021-34567

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-34567

请登录查看更多情报信息。

Other References for CVE-2021-34567 (1)

Same Patch Batch · WAGO · 2022-11-09 · 4 CVEs total

CVE-2021-34569 9.8 CRITICAL WAGO I/O-Check Service prone to Out-of-bounds Write
CVE-2021-34566 9.1 CRITICAL WAGO I/O-Check Service prone to Memory Overflow
CVE-2021-34568 7.5 HIGH WAGO I/O-Check Service prone to Allocation of Resources Without Limits or Throttling

IV. Related Vulnerabilities

Same product: 750-81xx/xxx-xxxFW
Same vendor: WAGO
Same weakness: CWE-125