CVE-2019-5186
Quick assessment
Affected
n/a Wago
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 PFC 200是德国WAGO公司的一款可编程逻辑控制器（PLC）。 WAGO PFC 200中的iocheckd服务的I/O-Check功能存在缓冲区错误漏洞。攻击者可借助特制的xml缓存文件利用该漏洞造成拒绝服务或可能执行代码。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2019-5186
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An exploitable stack buffer overflow vulnerability vulnerability exists in the iocheckd service "I/O-Check" functionality of WAGO PFC 200. An attacker can send a specially crafted packet to trigger the parsing of this cache file.At 0x1eb9c the extracted interface element name from the xml file is used as an argument to /etc/config-tools/config_interfaces interface=<contents of interface element> using sprintf(). The destination buffer sp+0x40 is overflowed with the call to sprintf() for any interface values that are greater than 512-len("/etc/config-tools/config_interfaces interface=") in length. Later, at 0x1ea08 strcpy() is used to copy the contents of the stack buffer that was overflowed sp+0x40 into sp+0x440. The buffer sp+0x440 is immediately adjacent to sp+0x40 on the stack. Therefore, there is no NULL termination on the buffer sp+0x40 since it overflowed into sp+0x440. The strcpy() will result in invalid memory access. An interface value of length 0x3c4 will cause the service to crash.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WAGO PFC 200 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WAGO PFC 200是德国WAGO公司的一款可编程逻辑控制器（PLC）。 WAGO PFC 200中的iocheckd服务的I/O-Check功能存在缓冲区错误漏洞。攻击者可借助特制的xml缓存文件利用该漏洞造成拒绝服务或可能执行代码。
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 |
|---|---|---|---|---|
| - | Wago | WAGO PFC200 Firmware version 03.02.02(14) | - |
|
II. Public POCs for CVE-2019-5186
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2019-5186 (1)
-
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0966 x_refsource_MISC
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IV. Related Vulnerabilities
V. Comments for CVE-2019-5186
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