CVE-2021-34585CWE-252

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

High · published October 26, 2021

CVSS v3.1
7.5
EPSS
1%
Percentile
59.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00903 · 59.4th percentile
Weakness
CWE-252 · Unchecked Return Value
Published
2021-10-26T09:55Z
EPSS history
Timeline
  • 26 OCT 09:55Z
    CODESYS V2 web server: crafted requests could trigger a pointer dereference with an invalid address (DoS)
    cvelistv5