Auth bypass in Bosch Access Management System
CVE-2021-23843
The Bosch software tools AccessIPConfig.exe and AmcIpConfig.exe are used to configure certains settings in AMC2 devices. The tool allows putting a password protection on configured devices to restrict access to the configuration of an AMC2. An attacker can circumvent this protection and make unauthorized changes to configuration data on the device. An attacker can exploit this vulnerability to manipulate the device\'s configuration or make it unresponsive in the local network. The attacker needs to have access to the local network, typically even the same subnet.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Bosch Access Management System — versions 3.0
- Bosch Access Professional Edition
- Bosch Amc2 — versions all
- Bosch Amc2 Firmware
- Bosch Ams — versions unspecified
- Bosch Ape — versions unspecified
- Bosch Bis — versions unspecified
- Bosch Building Integration System
Weakness classification (CWE)
References
- psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.html (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-23843?
- CVE-2021-23843 is a high-severity vulnerability in Bosch Access Management System, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2022-01-19.
- How severe is CVE-2021-23843?
- High severity. CVSS v3 base score is 8.8 out of 10.