CVE-2021-23842
CVSS V2 Low 3.6
CVSS V3 High 7.1
Description
Communication to the AMC2 uses a state-of-the-art cryptographic algorithm for symmetric encryption called Blowfish. An attacker could retrieve the key from the firmware to decrypt network traffic between the AMC2 and the host system. Thus, an attacker can exploit this vulnerability to decrypt and modify network traffic, decrypt and further investigate the device\'s firmware file, and change the device configuration. The attacker needs to have access to the local network, typically even the same subnet.
Overview
- CVE ID
- CVE-2021-23842
- Assigner
- psirt@bosch.com
- Vulnerability Status
- Analyzed
- Published Version
- 2022-01-19T21:15:08
- Last Modified Date
- 2022-01-28T17:58:52
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:bosch:amc2_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:bosch:amc2:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:a:bosch:access_management_system:3.0:*:*:*:*:*:*:* | 1 | OR | ||
| AND | ||||
| cpe:2.3:a:bosch:access_professional_edition:*:*:*:*:*:*:*:* | 1 | OR | 3.8.0 | |
| AND | ||||
| cpe:2.3:a:bosch:building_integration_system:*:*:*:*:*:*:*:* | 1 | OR | 4.9.1 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:N
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 3.6
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 7.1
- Base Severity
- HIGH
- Exploitability Score
- 1.8
- Impact Score
- 5.2
References
| Reference URL | Reference Tags |
|---|---|
| https://psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.html | Mitigation Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-23842 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23842 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:35:52 | Added to TrackCVE | |||
| 2022-12-06 07:15:38 | 2022-01-19T21:15Z | 2022-01-19T21:15:08 | CVE Published Date | updated |
| 2022-12-06 07:15:38 | 2022-01-28T17:58:52 | CVE Modified Date | updated | |
| 2022-12-06 07:15:38 | Analyzed | Vulnerability Status | updated |