High severity · published Aug 27, 2021
CVE-2021-40142
In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access…
7.5
CVSS
2.6%
EPSS
No
On KEV
Description
In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.6% · higher than 85% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LD
Local Discover Server · Opcfoundation
before 1.04.402.463 · source: NVD
SN
Simatic Net PC · Siemens
14; 15; 16; 17 · source: NVD
SP
Simatic Process Historian Opc UA Server Firmware · Siemens
before 2022; 2022 · source: NVD
SW
Simatic Wincc · Siemens
All versions, or not specified · source: NVD
SW
Simatic Wincc Runtime · Siemens
All versions, or not specified · source: NVD
SW
Simatic Wincc Unified Scada Runtime · Siemens
All versions, or not specified · source: NVD
TS
Telecontrol Server Basic · Siemens
3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-40142
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-40142
Patch
https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdf
Patch
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-40142.pdf
Vendor Advisory
https://opcfoundation.org/security-bulletins/