Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bosch | Amc2 Firmware | - |
| Bosch | Amc2 | - |
| Bosch | Access Management System | 3.0 |
| Bosch | Access Professional Edition | <= 3.8.0 |
| Bosch | Building Integration System | < 4.9.1 |
Related Weaknesses (CWE)
References
- https://psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.htmlMitigationVendor Advisory
- https://psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.htmlMitigationVendor Advisory
FAQ
What is CVE-2021-23842?
CVE-2021-23842 is a vulnerability with a CVSS score of 5.7 (MEDIUM). 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 betw...
How severe is CVE-2021-23842?
CVE-2021-23842 has been rated MEDIUM with a CVSS base score of 5.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-23842?
Check the references section above for vendor advisories and patch information. Affected products include: Bosch Amc2 Firmware, Bosch Amc2, Bosch Access Management System, Bosch Access Professional Edition, Bosch Building Integration System.