CVE-2021-21002
Denial of Service in Phoenix Contact FL COMSERVER UNI products
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
In Phoenix Contact FL COMSERVER UNI in versions < 2.40 a invalid Modbus exception response can lead to a temporary denial of service.
En Phoenix Contact FL COMSERVER UNI en versiones anteriores a 2.40, una respuesta de excepción Modbus no válida puede conllevar a una denegación de servicio temporal
*Credits:
This vulnerability was found by Petri Tuomio and reported to PHOENIX CONTACT by Waertsilae PSIRT. PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication.
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2020-12-17 CVE Reserved
- 2021-06-25 CVE Published
- 2024-03-08 EPSS Updated
- 2024-09-17 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-772: Missing Release of Resource after Effective Lifetime
CAPEC
References (1)
| URL | Tag | Source |
|---|---|---|
| https://cert.vde.com/en-us/advisories/vde-2021-022 | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Phoenixcontact Search vendor "Phoenixcontact" | Fl Comserver Uni 232\/422\/485 Firmware Search vendor "Phoenixcontact" for product "Fl Comserver Uni 232\/422\/485 Firmware" | < 2.40 Search vendor "Phoenixcontact" for product "Fl Comserver Uni 232\/422\/485 Firmware" and version " < 2.40" | - |
Affected
| in | Phoenixcontact Search vendor "Phoenixcontact" | Fl Comserver Uni 232\/422\/485 Search vendor "Phoenixcontact" for product "Fl Comserver Uni 232\/422\/485" | - | - |
Safe
|
| Phoenixcontact Search vendor "Phoenixcontact" | Fl Comserver Uni 232\/422\/485-t Firmware Search vendor "Phoenixcontact" for product "Fl Comserver Uni 232\/422\/485-t Firmware" | < 2.40 Search vendor "Phoenixcontact" for product "Fl Comserver Uni 232\/422\/485-t Firmware" and version " < 2.40" | - |
Affected
| in | Phoenixcontact Search vendor "Phoenixcontact" | Fl Comserver Uni 232\/422\/485-t Search vendor "Phoenixcontact" for product "Fl Comserver Uni 232\/422\/485-t" | - | - |
Safe
|