CVE-2019-5176

12.03.2020, 00:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	5.5 MEDIUM	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
talos	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 20%

Vendor	Product	Version
wago	pfc200_firmware	03.02.02\(14\)

𝑥

= Vulnerable software versions

Known Exploits!

Common Weakness Enumeration

CWE-787 - Out-of-bounds Write
The software writes data past the end, or before the beginning, of the intended buffer.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0963