CVE-2020-27738
CVSS V2 Medium 5.8
CVSS V3 High 7.4
Description
A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0). The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.
Overview
- CVE ID
- CVE-2020-27738
- Assigner
- productcert@siemens.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-04-22T21:15:09
- Last Modified Date
- 2022-04-22T19:44:09
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:siemens:simotics_connect_400_firmware:*:*:*:*:*:*:*:* | 1 | OR | 0.5.0.0 | |
| cpe:2.3:h:siemens:simotics_connect_400:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:* | 1 | OR | 2017.02.3 | |
| cpe:2.3:a:siemens:nucleus_readystart_v4:*:*:*:*:*:*:*:* | 1 | OR | 4.1.0 | |
| cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:P/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5.8
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 7.4
- Base Severity
- HIGH
- Exploitability Score
- 2.2
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf | Patch Vendor Advisory |
| https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf | Patch Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-27738 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27738 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:27:17 | Added to TrackCVE | |||
| 2022-12-06 02:23:44 | 2021-04-22T21:15Z | 2021-04-22T21:15:09 | CVE Published Date | updated |
| 2022-12-06 02:23:44 | 2022-04-22T19:44:09 | CVE Modified Date | updated | |
| 2022-12-06 02:23:44 | Analyzed | Vulnerability Status | updated |