Resource exhaustion in Wago Pfc100
CVE-2019-5149
The WBM web application on firmwares prior to 03.02.02 and 03.01.07 on the WAGO PFC100 and PFC2000, respectively, runs on a lighttpd web server and makes use of the FastCGI module, which is intended to provide high performance for all Internet applications without the penalties of Web server APIs. However, the default configuration of this module appears to limit the number of concurrent php-cgi processes to two, which can be abused to cause a denial of service of the entire web server. This affects WAGO PFC200 Firmware version 03.00.39(12) and version 03.01.07(13), and WAGO PFC100 Firmware version 03.00.39(12) and version 03.02.02(14).
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (78.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Wago Pfc100
- Wago Pfc100 Firmware — versions 03.01.07(13), 03.00.39(12), 03.01.07\(13\)
- Wago Pfc200
- Wago Pfc200 Firmware — versions 03.01.07(13), 03.00.39(12), 03.01.07\(13\)
- Wago Pfc100 Firmware — versions version 03.00.39(12), version 03.02.02(14)
- Wago Pfc200 Firmware — versions version 03.00.39(12), version 03.01.07(13)
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2019-0939 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-5149?
- CVE-2019-5149 is a high-severity vulnerability in Wago Pfc100, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-03-11.
- How severe is CVE-2019-5149?
- High severity. CVSS v3 base score is 7.5 out of 10.