Vulnerability · Published Oct 26, 2021 · Assigned by CERTVDE
CVE-2021-34583CODESYS V2 web server: crafted requests could trigger a heap-based buffer overflow (DoS)
High 7.5
In plain English
A high-severity heap buffer overflow in CODESYS V2 from CODESYS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.8% (higher than 95% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)8.8%top 4.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CODESYS | CODESYS V2 | all web servers – before V1.1.9.22 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H