Details of VAR-202104-1827

ID

VAR-202104-1827

CVE

CVE-2020-27009

TITLE

Siemens Nucleus product out-of-bounds write vulnerability (CNVD-2021-28701)

Trust: 0.6

sources: CNVD: CNVD-2021-28701

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. The Nucleus NET module contains a series of standard-compliant network and communication protocols, drivers and utilities to provide full-featured network support in any embedded device. The Siemens Nucleus product has an out-of-bounds write vulnerability. Pillow is a Python-based image processing library. There is currently no information about this vulnerability, please feel free to follow CNNVD or manufacturer announcements

Trust: 2.07

sources: NVD: CVE-2020-27009 // CNVD: CNVD-2021-28701 // CNNVD: CNNVD-202104-975 // VULMON: CVE-2020-27009

IOT TAXONOMY

category:

['ICS']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-28701

AFFECTED PRODUCTS

vendor:	siemens	model:	nucleus net	scope:	lt	version:	5.2	Trust: 1.0
vendor:	siemens	model:	nucleus source code	scope:	eq	version:	-	Trust: 1.0
vendor:	siemens	model:	vstar	scope:	-	version:	-	Trust: 0.6
vendor:	siemens	model:	nucleus source code	scope:	-	version:	-	Trust: 0.6
vendor:	siemens	model:	nucleus rtos	scope:	-	version:	-	Trust: 0.6
vendor:	siemens	model:	nucleus net	scope:	lt	version:	v5.2	Trust: 0.6

sources: CNVD: CNVD-2021-28701 // NVD: CVE-2020-27009

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-27009
value:	HIGH
Trust: 1.0
productcert@siemens.com:	CVE-2020-27009
value:	HIGH
Trust: 1.0
CNVD:	CNVD-2021-28701
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202104-975
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-202104-996
value:	HIGH
Trust: 0.6
VULMON:	CVE-2020-27009
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2020-27009
severity:	MEDIUM
baseScore:	6.8
vectorString:	AV:N/AC:M/AU:N/C:P/I:P/A:P
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	8.6
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.1
CNVD:	CNVD-2021-28701
severity:	HIGH
baseScore:	7.6
vectorString:	AV:N/AC:H/AU:N/C:C/I:C/A:C
accessVector:	NETWORK
accessComplexity:	HIGH
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	4.9
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2020-27009
baseSeverity:	HIGH
baseScore:	8.1
vectorString:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	2.2
impactScore:	5.9
version:	3.1
Trust: 2.0

sources: CNVD: CNVD-2021-28701 // VULMON: CVE-2020-27009 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202104-996 // NVD: CVE-2020-27009 // NVD: CVE-2020-27009

PROBLEMTYPE DATA

problemtype:	CWE-823	Trust: 1.0
problemtype:	CWE-787	Trust: 1.0

sources: NVD: CVE-2020-27009

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202104-996

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202104-975

PATCH

title:	Patch for Siemens Nucleus product out-of-bounds write vulnerability (CNVD-2021-28701)	url:	https://www.cnvd.org.cn/patchInfo/show/258411	Trust: 0.6
title:	Siemens Nucleus Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=147376	Trust: 0.6
title:	Siemens Security Advisories: Siemens Security Advisory	url:	https://vulmon.com/vendoradvisory?qidtp=siemens_security_advisories&qid=01a7c311af93ac6e3744c16b5c159592	Trust: 0.1
title:	Threatpost	url:	https://threatpost.com/namewreck-bugs-businesses/165385/	Trust: 0.1

sources: CNVD: CNVD-2021-28701 // VULMON: CVE-2020-27009 // CNNVD: CNNVD-202104-996

EXTERNAL IDS

db:	SIEMENS	id:	SSA-185699	Trust: 2.3
db:	NVD	id:	CVE-2020-27009	Trust: 2.3
db:	SIEMENS	id:	SSA-180579	Trust: 1.0
db:	ICS CERT	id:	ICSA-21-103-04	Trust: 0.7
db:	CNVD	id:	CNVD-2021-28701	Trust: 0.6
db:	CS-HELP	id:	SB2021041363	Trust: 0.6
db:	CNNVD	id:	CNNVD-202104-975	Trust: 0.6
db:	AUSCERT	id:	ESB-2021.1246	Trust: 0.6
db:	CS-HELP	id:	SB2021041409	Trust: 0.6
db:	CNNVD	id:	CNNVD-202104-996	Trust: 0.6
db:	VULMON	id:	CVE-2020-27009	Trust: 0.1

sources: CNVD: CNVD-2021-28701 // VULMON: CVE-2020-27009 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202104-996 // NVD: CVE-2020-27009

REFERENCES

url:	https://cert-portal.siemens.com/productcert/pdf/ssa-185699.pdf	Trust: 2.3
url:	https://us-cert.cisa.gov/ics/advisories/icsa-21-103-04	Trust: 1.3
url:	https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf	Trust: 1.0
url:	https://www.cybersecurity-help.cz/vdb/sb2021041363	Trust: 0.6
url:	https://nvd.nist.gov/vuln/detail/cve-2020-27009	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2021.1246	Trust: 0.6
url:	https://www.cybersecurity-help.cz/vdb/sb2021041409	Trust: 0.6
url:	https://cwe.mitre.org/data/definitions/823.html	Trust: 0.1
url:	https://nvd.nist.gov	Trust: 0.1
url:	https://threatpost.com/namewreck-bugs-businesses/165385/	Trust: 0.1
url:	https://cert-portal.siemens.com/productcert/txt/ssa-185699.txt	Trust: 0.1

sources: CNVD: CNVD-2021-28701 // VULMON: CVE-2020-27009 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202104-996 // NVD: CVE-2020-27009

CREDITS

Daniel dos Santos, from Forescout Technologies, and Siemens reported these vulnerabilities to CISA.

Trust: 0.6

sources: CNNVD: CNNVD-202104-996

SOURCES

db:	CNVD	id:	CNVD-2021-28701
db:	VULMON	id:	CVE-2020-27009
db:	CNNVD	id:	CNNVD-202104-975
db:	CNNVD	id:	CNNVD-202104-996
db:	NVD	id:	CVE-2020-27009

LAST UPDATE DATE

2024-08-14T12:10:00.332000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-28701	date:	2021-04-15T00:00:00
db:	VULMON	id:	CVE-2020-27009	date:	2021-04-30T00:00:00
db:	CNNVD	id:	CNNVD-202104-975	date:	2021-04-14T00:00:00
db:	CNNVD	id:	CNNVD-202104-996	date:	2022-08-10T00:00:00
db:	NVD	id:	CVE-2020-27009	date:	2023-08-08T10:15:11.637

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-28701	date:	2021-04-15T00:00:00
db:	VULMON	id:	CVE-2020-27009	date:	2021-04-22T00:00:00
db:	CNNVD	id:	CNNVD-202104-975	date:	2021-04-13T00:00:00
db:	CNNVD	id:	CNNVD-202104-996	date:	2021-04-13T00:00:00
db:	NVD	id:	CVE-2020-27009	date:	2021-04-22T21:15:09.220