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[email protected]CVE-2021-21002

HistoryJun 25, 2021 - 7:15 p.m.

CVE-2021-21002

2021-06-2519:15:08

CWE-772

[email protected]

web.nvd.nist.gov

cve-2021-21002

phoenix contact

fl comserver uni

modbus

denial of service

nvd

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.2 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.6%

JSON

In Phoenix Contact FL COMSERVER UNI in versions < 2.40 a invalid Modbus exception response can lead to a temporary denial of service.

Affected configurations

NVD

Node

phoenixcontactfl_comserver_uni_232\/422\/485_firmwareRange<2.40

AND

phoenixcontactfl_comserver_uni_232\/422\/485Match-

Node

phoenixcontactfl_comserver_uni_232\/422\/485-t_firmwareRange<2.40

AND

phoenixcontactfl_comserver_uni_232\/422\/485-tMatch-

CPENameOperatorVersion
phoenixcontact:fl_comserver_uni_232\/422\/485_firmwarephoenixcontact fl comserver uni 232/422/485 firmwarelt2.40

CPE	Name	Operator	Version
phoenixcontact:fl_comserver_uni_232\/422\/485_firmware	phoenixcontact fl comserver uni 232/422/485 firmware	lt	2.40

CNA Affected

[
  {
    "product": "FL COMSERVER",
    "vendor": "Phoenix Contact",
    "versions": [
      {
        "lessThan": "2.40",
        "status": "affected",
        "version": "UNI 232/422/485 (2313452)",
        "versionType": "custom"
      },
      {
        "lessThan": "2.40",
        "status": "affected",
        "version": "UNI 232/422/485-T (2904817)",
        "versionType": "custom"
      }
    ]
  }
]

References

cert.vde.com/en-us/advisories/vde-2021-022

Social References

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.2 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.6%

JSON

Related for CVE-2021-21002

nvd1 cvelist1 prion1