CVEs-PoC/2020/CVE-2020-27009.md

### [CVE-2020-27009](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27009)
![](https://img.shields.io/static/v1?label=Product&message=APOGEE%20PXC%20Compact%20(BACnet)&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=APOGEE%20PXC%20Compact%20(P2%20Ethernet)&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=APOGEE%20PXC%20Modular%20(BACnet)&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=APOGEE%20PXC%20Modular%20(P2%20Ethernet)&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Nucleus%20NET&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Nucleus%20Source%20Code&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=TALON%20TC%20Compact%20(BACnet)&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=TALON%20TC%20Modular%20(BACnet)&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20All%20versions%20%3C%20V2.8.20%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20All%20versions%20%3C%20V3.5.5%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20All%20versions%20%3C%20V5.2%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20Versions%20including%20affected%20DNS%20modules%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-823%3A%20Use%20of%20Out-of-range%20Pointer%20Offset&color=brighgreen)

### Description

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 < V5.2), Nucleus Source Code (Versions including affected DNS modules), 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 write past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to execute code in the context of the current process or cause a denial-of-service condition.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon