CVE-2020-12526
CVSS V2 Medium 5
CVSS V3 Medium 5.3
Description
TwinCAT OPC UA Server in versions up to 2.3.0.12 and IPC Diagnostics UA Server in versions up to 3.1.0.1 from Beckhoff Automation GmbH & Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs.
Overview
- CVE ID
- CVE-2020-12526
- Assigner
- info@cert.vde.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-05-13T14:15:17
- Last Modified Date
- 2021-05-25T15:02:14
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:beckhoff:ipc_diagnostics_ua_server:*:*:*:*:*:*:*:* | 1 | OR | 3.1.0.1 | |
| cpe:2.3:a:beckhoff:tf6100:*:*:*:*:*:*:*:* | 1 | OR | 3.3.18 | |
| cpe:2.3:a:beckhoff:twincat_opc_ua_server:*:*:*:*:*:*:*:* | 1 | OR | 2.3.0.12 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- LOW
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2021-001.pdf | Vendor Advisory |
| https://cert.vde.com/en-us/advisories/vde-2020-051 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-12526 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12526 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:14:57 | Added to TrackCVE | |||
| 2022-12-05 02:12:08 | 2021-05-13T14:15Z | 2021-05-13T14:15:17 | CVE Published Date | updated |
| 2022-12-05 02:12:08 | 2021-05-25T15:02:14 | CVE Modified Date | updated | |
| 2022-12-05 02:12:08 | Analyzed | Vulnerability Status | updated |