CVE-2019-5181: Buffer Overflow
First published: Wed Mar 11 2020(Updated: )
An exploitable stack buffer overflow vulnerability vulnerability exists in the iocheckd service ‘I/O-Check’ functionality of WAGO PFC 200 Firmware version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can cause a stack buffer overflow, resulting in code execution. An attacker can send a specially crafted packet to trigger the parsing of this cache file. The destination buffer sp+0x440 is overflowed with the call to sprintf() for any subnetmask values that are greater than 1024-len(‘/etc/config-tools/config_interfaces interface=X1 state=enabled subnet-mask=‘) in length. A subnetmask value of length 0x3d9 will cause the service to crash.
Credit: talos-cna@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| WAGO PFC200 Firmware | =03.02.02\(14\) | |
| WAGO PFC200 |
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Frequently Asked Questions
What is CVE-2019-5181?
CVE-2019-5181 is a stack buffer overflow vulnerability in the iocheckd service 'I/O-Check' functionality of WAGO PFC 200 Firmware version 03.02.02(14).
How severe is CVE-2019-5181?
CVE-2019-5181 has a severity score of 7.8, which is considered high.
How does CVE-2019-5181 occur?
CVE-2019-5181 occurs when a specially crafted XML cache file is written to a specific location on the device, causing a stack buffer overflow.
What is the affected software of CVE-2019-5181?
The affected software is WAGO PFC 200 Firmware version 03.02.02(14).
How can CVE-2019-5181 be fixed?
To fix CVE-2019-5181, users should update to a patched version of WAGO PFC 200 Firmware.
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