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cvelistCERTVDECVELIST:CVE-2021-34584
HistoryOct 26, 2021 - 9:55 a.m.

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

2021-10-2609:55:46
CWE-126
CERTVDE
www.cve.org
2
cve-2021-34584
codesys v2
web server
buffer over-read
denial-of-service

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

9.1

Confidence

High

EPSS

0.004

Percentile

75.3%

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.

CNA Affected

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

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

9.1

Confidence

High

EPSS

0.004

Percentile

75.3%

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