Buffer overflow in Wago Pfc200
CVE-2019-5181
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (57.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Wago Pfc200
- Wago Pfc200 Firmware — versions 03.02.02\(14\), 03.02.02(14)
- Wago Pfc200 — versions Firmware version 03.02.02(14)
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2019-0963 (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-5181?
- CVE-2019-5181 is a high-severity vulnerability in Wago Pfc200, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-03-12.
- How severe is CVE-2019-5181?
- High severity. CVSS v3 base score is 7.8 out of 10.