CVE-2020-27738
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.
Se ha identificado una vulnerabilidad en Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a V2017.02.3), Nucleus ReadyStart V4 (Todas las versiones anteriores a V4.1.0), Nucleus Source Code (Versiones que incluyen los módulos DNS afectados), SIMOTICS CONNECT 400 (Todas las versiones anteriores a V0.5.0.0). La funcionalidad de descompresión de registros de nombres de dominio DNS no valida correctamente los valores de desplazamiento de puntero. El análisis sintáctico de respuestas malformadas podría dar lugar a un acceso de lectura más allá del final de una estructura asignada. Un atacante con una posición privilegiada en la red podría aprovechar esta vulnerabilidad para provocar una condición de denegación de servicio
CVSS Scores
SSVC
- Decision:-
Timeline
- 2020-10-26 CVE Reserved
- 2021-04-22 CVE Published
- 2024-08-04 CVE Updated
- 2024-10-12 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-788: Access of Memory Location After End of Buffer
CAPEC
References (3)
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf | 2023-08-08 | |
| https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf | 2023-08-08 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Siemens Search vendor "Siemens" | Simotics Connect 400 Firmware Search vendor "Siemens" for product "Simotics Connect 400 Firmware" | < 0.5.0.0 Search vendor "Siemens" for product "Simotics Connect 400 Firmware" and version " < 0.5.0.0" | - |
Affected
| in | Siemens Search vendor "Siemens" | Simotics Connect 400 Search vendor "Siemens" for product "Simotics Connect 400" | - | - |
Safe
|
| Siemens Search vendor "Siemens" | Nucleus Net Search vendor "Siemens" for product "Nucleus Net" | * | - |
Affected
| ||||||
| Siemens Search vendor "Siemens" | Nucleus Readystart V3 Search vendor "Siemens" for product "Nucleus Readystart V3" | < 2017.02.3 Search vendor "Siemens" for product "Nucleus Readystart V3" and version " < 2017.02.3" | - |
Affected
| ||||||
| Siemens Search vendor "Siemens" | Nucleus Readystart V4 Search vendor "Siemens" for product "Nucleus Readystart V4" | < 4.1.0 Search vendor "Siemens" for product "Nucleus Readystart V4" and version " < 4.1.0" | - |
Affected
| ||||||
| Siemens Search vendor "Siemens" | Nucleus Source Code Search vendor "Siemens" for product "Nucleus Source Code" | - | - |
Affected
| ||||||