Vulnerability Details : CVE-2020-27737
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 response parsing functionality does not properly validate various length and counts of the records. 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 memory past the allocated structure.
Vulnerability category: Denial of service
Products affected by CVE-2020-27737
- cpe:2.3:o:siemens:simotics_connect_400_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:nucleus_readystart_v4:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27737
0.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 59 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27737
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:P |
8.6
|
4.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H |
2.2
|
4.2
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H |
2.2
|
4.2
|
Siemens AG |
CWE ids for CVE-2020-27737
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- productcert@siemens.com (Secondary)
References for CVE-2020-27737
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