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CERTVDECVE-2021-34584

HistoryOct 26, 2021 - 10:15 a.m.

CVE-2021-34584

2021-10-2610:15:07

CWE-126

CERTVDE

web.nvd.nist.gov

cve-2021-34584

web server

memory exploit

denial-of-service

codesys v2

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:N/A:P

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

AI Score

8.8

Confidence

High

EPSS

0.004

Percentile

75.3%

JSON

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 configurations

Nvd

Node

codesyscodesysRange<1.1.9.22

VendorProductVersionCPE
codesyscodesys*cpe:2.3:a:codesys:codesys:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
codesys	codesys	*	cpe:2.3:a:codesys:codesys::::::::

CNA Affected

[
  {
    "product": "CODESYS V2",
    "vendor": "CODESYS",
    "versions": [
      {
        "lessThan": "V1.1.9.22",
        "status": "affected",
        "version": "all web servers",
        "versionType": "custom"
      }
    ]
  }
]

References

customers.codesys.com/index.php?eID=dumpFile&t=f&f=16876&token=a3f1d937f95e7034879f4f2ea8e5a99b168256a7&download=

www.tenable.com/security/research/tra-2021-47

CVSS2

6.4

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:N/A:P

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

AI Score

8.8

Confidence

High

EPSS

0.004

Percentile

75.3%

JSON

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