CVE-2019-5176

Public Exploit

Description

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). An attacker can send a specially crafted packet to trigger the parsing of this cache file.The destination buffer sp+0x40 is overflowed with the call to sprintf() for any gateway values that are greater than 512-len(‘/etc/config-tools/config_default_gateway number=0 state=enabled value=‘) in length. A gateway value of length 0x7e2 will cause the service to crash.

References

Link	Tags
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0963	exploit mitigation third party advisory technical description

Frequently Asked Questions

What is the severity of CVE-2019-5176?: CVE-2019-5176 has been scored as a medium severity vulnerability.
How to fix CVE-2019-5176?: To fix CVE-2019-5176, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-5176 being actively exploited in the wild?: It is possible that CVE-2019-5176 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-5176?: CVE-2019-5176 affects Wago WAGO PFC200.

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Description

Category

CWE-787 – Out-of-bounds Write

References

Frequently Asked Questions