CVE-2018-5440

moderate-risk
Published 2018-02-15

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.

Do I need to act?

~
1.3% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (2)

Codesys Runtime System
Codesys Web Server

Affected Vendors

3S-Software

References (4)

Third Party Advisory http://www.securityfocus.com/bid/102909
Third Party Advisory https://ics-cert.us-cert.gov/advisories/ICSA-18-032-02
Third Party Advisory http://www.securityfocus.com/bid/102909
Third Party Advisory https://ics-cert.us-cert.gov/advisories/ICSA-18-032-02
43
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 4/34 · Minimal
Exposure 7/34 · Low