CVE-2021-34585

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

State: Published
Severity: 7.5 High
Published: Oct 26, 2021
Updated: Sep 16, 2024
Reserved: Jun 10, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CERTVDE

Weaknesses

CWE-252 Unchecked Return Value

Affected Products

Product	Versions
CODESYS V2CODESYS	all web servers to before V1.1.9.22Affected

References

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=
https://www.tenable.com/security/research/tra-2021-47

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