CVE-2021-21002

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

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://cert.vde.com/en-us/advisories/vde-2021-022	Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2021-022	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:phoenixcontact:fl_comserver_uni_232\/422\/485_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:phoenixcontact:fl_comserver_uni_232\/422\/485:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:phoenixcontact:fl_comserver_uni_232\/422\/485-t_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:phoenixcontact:fl_comserver_uni_232\/422\/485-t:-:*:*:*:*:*:*:*

History

21 Nov 2024, 05:47

Type	Values Removed	Values Added
References	~~() https://cert.vde.com/en-us/advisories/vde-2021-022 - Third Party Advisory~~	() https://cert.vde.com/en-us/advisories/vde-2021-022 - Third Party Advisory

Information

Published : 2021-06-25 19:15

Updated : 2024-11-21 05:47

NVD link : CVE-2021-21002

Mitre link : CVE-2021-21002

CVE.ORG link : CVE-2021-21002

JSON object : View

Products Affected

phoenixcontact

fl_comserver_uni_232\/422\/485
fl_comserver_uni_232\/422\/485_firmware
fl_comserver_uni_232\/422\/485-t_firmware
fl_comserver_uni_232\/422\/485-t

CWE

CWE-772

Missing Release of Resource after Effective Lifetime

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