Buffer overflow in 3s-Software Codesys Runtime System
CVE-2018-5440
A Stack-based Buffer Overflow issue was discovered in 3S-Smart CODESYS Web Server. Specifically: all Microsoft Windows (also WinCE) based CODESYS web servers running stand-alone Version 2.3, or as part of the CODESYS runtime system running prior to Version V1.1.9.19. A crafted request may cause a buffer overflow and could therefore execute arbitrary code on the web server or lead to a denial-of-service condition due to a crash in the web server.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
- 3s-Software Codesys Runtime System
- 3s-Software Codesys Web Server — versions 2.3
- 3s-Smart Software Solutions Gmbh Codesys Web Server — versions 3S-Smart Software Solutions GmbH CODESYS Web Server
Weakness classification (CWE)
References
- www.securityfocus.com/bid/102909 (VDB Entry, Third Party Advisory, vdb-entry)
- ics-cert.us-cert.gov/advisories/ICSA-18-032-02 (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-5440?
- CVE-2018-5440 is a critical-severity vulnerability in 3s-Software Codesys Runtime System, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2018-02-15.
- How severe is CVE-2018-5440?
- Critical severity. CVSS v3 base score is 9.8 out of 10.