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.
Published 2022-01-19 21:15:08
Updated 2022-01-28 17:58:52
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-23842

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-23842

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.6
LOW AV:L/AC:L/Au:N/C:P/I:P/A:N
3.9
4.9
NIST
7.1
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
1.8
5.2
NIST
5.7
MEDIUM CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
2.1
3.6
Robert Bosch GmbH

CWE ids for CVE-2021-23842

  • The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered.
    Assigned by: psirt@bosch.com (Secondary)
  • The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-23842

Products affected by CVE-2021-23842

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