CVE-2018-5440: 3s-software codesys_runtime_system Stack-based Buffer Overflow
Vulnerability summary
CVE-2018-5440 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in 3s-software codesys_runtime_system. EPSS estimates a 3.10% chance of exploitation in the next 30 days, higher than 87.5% of scored vulnerabilities.
Timeline
- 15-02-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
3.10%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
0.00 pp
From 3.10% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
3s-software2 products
- codesys_runtime_system< 1.1.9.19
- codesys_web_server2.3
1 vendor · 2 products
References
2 links- ics-cert.us-cert.gov/advisories/ICSA-18-032-02X Refsource MISCThird Party AdvisoryUS Government Resource