CVE-2021-21002

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
In Phoenix Contact FL COMSERVER UNI in versions < 2.40 a invalid Modbus exception response can lead to a temporary denial of service.
Overview
  • CVE ID
  • CVE-2021-21002
  • Assigner
  • info@cert.vde.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-25T19:15:08
  • Last Modified Date
  • 2021-07-01T19:43:58
Weakness Enumerations
CWE URL
CWE-772 http://cwe.mitre.org/data/definitions/772.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:phoenixcontact:fl_comserver_uni_232\/422\/485_firmware:*:*:*:*:*:*:*:* 1 OR 2.40
cpe:2.3:h:phoenixcontact:fl_comserver_uni_232\/422\/485:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:phoenixcontact:fl_comserver_uni_232\/422\/485-t_firmware:*:*:*:*:*:*:*:* 1 OR 2.40
cpe:2.3:h:phoenixcontact:fl_comserver_uni_232\/422\/485-t:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://cert.vde.com/en-us/advisories/vde-2021-022 Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-21002
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21002
History
Created Old Value New Value Data Type Notes
2022-05-10 07:09:08 Added to TrackCVE
2022-12-05 05:02:23 2021-06-25T19:15Z 2021-06-25T19:15:08 CVE Published Date updated
2022-12-05 05:02:23 2021-07-01T19:43:58 CVE Modified Date updated
2022-12-05 05:02:23 Analyzed Vulnerability Status updated