CVE-2020-27738
22.04.2021, 21:15
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.Enginsight
| Vendor | Product | Version |
|---|---|---|
| siemens | simotics_connect_400_firmware | 𝑥 < 0.5.0.0 |
| siemens | nucleus_net | * |
| siemens | nucleus_readystart_v3 | 𝑥 < 2017.02.3 |
| siemens | nucleus_readystart_v4 | 𝑥 < 4.1.0 |
| siemens | nucleus_source_code | - |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-788 - Access of Memory Location After End of BufferThe software reads or writes to a buffer using an index or pointer that references a memory location after the end of the buffer.
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory BufferThe software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
References