CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS)
CVE-2021-34584

9.1CRITICAL

Key Information:

Vendor

Codesys

Status
Codesys V2
Vendor
CVE Published:
26 October 2021

What is CVE-2021-34584?

Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.

Affected Version(s)

CODESYS V2 all web servers

References

https://customers.codesys.com/index.php?eID=dumpFile&t=f&...
x_refsource_CONFIRM
https://www.tenable.com/security/research/tra-2021-47
x_refsource_MISC

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This vulnerability was discovered by Tenable Research.
.