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CVE-2020-27738 Detail

Current 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), 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.


View Analysis Description

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf Patch  Vendor Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf Patch  Vendor Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf Patch  Vendor Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf Patch  Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer cwe source acceptance level NIST  
CWE-788 Access of Memory Location After End of Buffer Siemens AG  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-27738
NVD Published Date:
04/22/2021
NVD Last Modified:
11/21/2024
Source:
Siemens AG