CVE-2020-27632
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 SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions.
En la familia SIMATIC MV400 versiones anteriores a la v7.0.6, el generador ISN es inicializado con un valor constante y presenta incrementos constantes. Un atacante podría predecir y secuestrar sesiones de TCP
*Credits:
N/A
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
- 2020-10-22 CVE Reserved
- 2021-03-10 CVE Published
- 2023-11-24 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (3)
| URL | Tag | Source |
|---|---|---|
| https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01 | ||
| https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-599268.pdf | 2023-10-10 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Siemens Search vendor "Siemens" | Simatic Mv420 Firmware Search vendor "Siemens" for product "Simatic Mv420 Firmware" | < 7.0.6 Search vendor "Siemens" for product "Simatic Mv420 Firmware" and version " < 7.0.6" | - |
Affected
| in | Siemens Search vendor "Siemens" | Simatic Mv420 Search vendor "Siemens" for product "Simatic Mv420" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Simatic Mv440 Firmware Search vendor "Siemens" for product "Simatic Mv440 Firmware" | < 7.0.6 Search vendor "Siemens" for product "Simatic Mv440 Firmware" and version " < 7.0.6" | - |
Affected
| in | Siemens Search vendor "Siemens" | Simatic Mv440 Search vendor "Siemens" for product "Simatic Mv440" | - | - |
Safe
|