CVE-2021-23842
Last modified
CVE-2021-23842 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bosch | Amc2 Firmware | All versions |
| Bosch | Access Management System | 3.0 |
| Bosch | Access Professional Edition | <= 3.8.0 |
| Bosch | Building Integration System | < 4.9.1 |
References
- https://psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.htmlMitigation, Vendor Advisory
- https://psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.htmlMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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