Vulnerability · Published Apr 22, 2021 · Assigned by siemens
CVE-2020-15795
High 8.1
In plain English
A high-severity out-of-bounds write in APOGEE PXC Compact (BACnet) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 6.4% (higher than 94% of all known vulnerabilities).
Official 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 label parsing functionality does not properly validate the names in DNS-responses. 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.5 |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions < V2.8.20 |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.5 |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions < V2.8.20 |
| Siemens | Nucleus NET | All versions < V5.2 |
| Siemens | Nucleus Source Code | Versions including affected DNS modules |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.5 |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.5 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C