Buffer overflow in Opcfoundation Local_discover_server
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 class: Buffer Overflow
EPSS: 0.026 (83.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Opcfoundation Local_discover_server
- Siemens Simatic_net_pc — versions 14, 15, 16
- Siemens Simatic_process_historian_opc_ua_server
- Siemens Simatic_process_historian_opc_ua_server_firmware — versions 2022
- Siemens Simatic_wincc
- Siemens Simatic_wincc_runtime
- Siemens Simatic_wincc_unified_scada_runtime
- Siemens Telecontrol_server_basic — versions 3.0
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-40142?
- CVE-2021-40142 is a high-severity vulnerability in Opcfoundation Local_discover_server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2021-08-27.
- How severe is CVE-2021-40142?
- High severity. CVSS v3 base score is 7.5 out of 10.