ACERA 1320: Improper Authentication
CVE-2023-42771 is a high-severity improper authentication vulnerability in ACERA 1320 from FURUNO SYSTEMS, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected ACERA 1320 versions: firmware ver.01.26 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 0.37% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of ACERA 1320 you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on furunosystems.co.jp for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| FURUNO SYSTEMS | ACERA 1320 | firmware ver.01.26 and earlier | Not stated |
| FURUNO SYSTEMS | ACERA 1310 | firmware ver.01.26 and earlier | Not stated |
| Furunosystems | acera_1320_firmware | 01.26 and earlier | Not stated |
| Furunosystems | acera_1310_firmware | 01.26 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
- AdjacentThe attacker must be on the same local network segment.
- 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
- UnchangedImpact stays within the vulnerable component.
- 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | NVD |
| CVSS 3.1 | 8.3 | High | CISA (ADP) |
Official description
Authentication bypass vulnerability in ACERA 1320 firmware ver.01.26 and earlier, and ACERA 1310 firmware ver.01.26 and earlier allows a network-adjacent unauthenticated attacker who can access the affected product to download configuration files and/or log files, and upload configuration files and/or firmware. They are affected when running in ST(Standalone) mode.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- jvn.jp/en/vu/JVNVU94497038/Third Party Advisory
Other vulnerabilities in ACERA 1320
- 8.8 High severity
Recent Improper Authentication vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 9.1 Critical severity
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