CODESYS V2 web server: crafted requests could trigger a pointer dereference with an invalid address (DoS)
CVE-2021-34585

7.5HIGH

Key Information:

Vendor

Codesys

Status
Codesys V2
Vendor
CVE Published:
26 October 2021

What is CVE-2021-34585?

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since the parser result is not checked under all conditions, a pointer dereference with an invalid address can occur. This leads to a denial of service situation.

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:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
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.
.