Smart Alarm NXAL-100: Use of Hard-coded Credentials
CVE-2023-1748 is a critical-severity use of hard-coded credentials vulnerability in Smart Alarm NXAL-100 from Nexx, with a CVSS 3.1 base score of 10.0 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Smart Alarm NXAL-100 versions: nxal100v-p1-9-1 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.83% chance of exploitation within 30 days, higher than 58% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of Smart Alarm NXAL-100 you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Nexx | Smart Alarm NXAL-100 | nxal100v-p1-9-1 and earlier | Not stated |
| Nexx | Smart Plug NXPG-100W | nxpg100cv4-0-0 and earlier | Not stated |
| Nexx | Garage Door Controller NXG-100B, NXG-200 | nxg200v-p3-4-1 and earlier | Not stated |
| Getnexx | Nxal-100 Firmware | nxal100v-p1-9-1 and earlier | Not stated |
| Getnexx | Nxg-100b Firmware | nxg100bv-p3-4-1 and earlier | Not stated |
| Getnexx | Nxpg-100w Firmware | nxpg100cv4-0-0 and earlier | Not stated |
| Getnexx | Nxg-200 Firmware | nxg200v-p3-4-1 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.3 | Critical | CNA (hq.dhs.gov) |
| CVSS 3.1 | 10.0 | Critical | NVD |
Official description
The listed versions of Nexx Smart Home devices use hard-coded credentials. An attacker with unauthenticated access to the Nexx Home mobile application or the affected firmware could view the credentials and access the MQ Telemetry Server (MQTT) server and the ability to remotely control garage doors or smart plugs for any customer.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Hard-coded Credentials
The product contains hard-coded credentials, such as a password or cryptographic key.
How developers prevent this class of flaw
- For outbound authentication: store passwords, keys, and other credentials outside of the code in a strongly-protected, encrypted configuration file or database that is protected from access by all outsiders, including other local users on the same system. Properly protect the key (CWE-320). If you cannot use encryption to protect the file, then make sure that the permissions are as restrictive as possible. In Windows environments, the Encrypted File System (EFS) may provide some protection.
- For inbound authentication: Rather than hard-code a default username and password, key, or other authentication credentials for first time logins, utilize a first login mode that requires the user to enter a unique strong password or key.
- If the product must contain hard-coded credentials or they cannot be removed, perform access control checks and limit which entities can access the feature that requires the hard-coded credentials. For example, a feature might only be enabled through the system console instead of through a network connection.
More Use of Hard-coded Credentials vulnerabilities (CWE-798)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cisa.gov/news-events/ics-advisories/icsa-23-094-01Third Party Advisory, US Government Resource
Other vulnerabilities in Smart Alarm NXAL-100
- 7.1 High severity
Recent Use of Hard-coded Credentials vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 8.1 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Spotted an error? Tell us.