// For flags

CVE-2020-27736

 

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
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 label parsing functionality does not properly validate the null-terminated name in DNS-responses. The parsing of malformed responses could result in a read 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 or leak the read memory.

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 análisis de etiquetas de nombres de dominio DNS no valida correctamente los nombres terminados en cero en las respuestas DNS. El análisis sintáctico de las respuestas malformadas podría dar lugar a una 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 o filtrar la memoria de lectura

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-10-26 CVE Reserved
  • 2021-04-22 CVE Published
  • 2024-01-06 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-125: Out-of-bounds Read
  • CWE-170: Improper Null Termination
CAPEC
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
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 Simotics Connect 400
Search vendor "Siemens" for product "Simotics Connect 400"
--
Safe
Siemens
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 Nucleus Net
Search vendor "Siemens" for product "Nucleus Net"
*-
Affected
Siemens
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 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