CVE-2021-23842
MEDIUMBosch AMC2 Firmware - Use of Hard-coded Cryptographic Key
Title source: llmDescription
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.
References (1)
Core 1
Core References
Mitigation, Vendor Advisory x_refsource_confirm
https://psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.html
Scores
CVSS v3
5.7
EPSS
0.0014
EPSS Percentile
4.0%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Details
CWE
CWE-321
CWE-798
Status
published
Products (4)
bosch/access_management_system
3.0
bosch/access_professional_edition
< 3.8.0
bosch/amc2_firmware
bosch/building_integration_system
< 4.9.1
Published
Jan 19, 2022
Tracked Since
Feb 18, 2026