Vulnerability Details : 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 of a Memory Location After the End of a Buffer.
Vulnerability category: OverflowDenial of service
Products affected by CVE-2021-40142
- cpe:2.3:a:siemens:simatic_wincc:-:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_runtime:-:*:*:*:professional:*:*:*
- cpe:2.3:a:siemens:simatic_net_pc:16:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_net_pc:15:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_net_pc:17:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_net_pc:14:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:telecontrol_server_basic:3.0:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_process_historian_opc_ua_server_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_process_historian_opc_ua_server_firmware:2022:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_unified_scada_runtime:-:*:*:*:*:*:*:*
- cpe:2.3:a:opcfoundation:local_discover_server:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-40142
0.42%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-40142
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
MITRE | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-40142
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-40142
-
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-40142.pdf
Patch;Vendor Advisory
-
https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdf
Patch;Third Party Advisory
-
https://opcfoundation.org/security-bulletins/
Security Bulletins - OPC FoundationVendor Advisory
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