ASIK AirScale: Assumed-Immutable Data is Stored in Writable Memory
CVE-2022-2483 is a high-severity assumed-immutable data is stored in writable memory vulnerability in ASIK AirScale from Nokia, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected ASIK AirScale versions: 474021A.101; 474021A.102. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.23% 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 ASIK AirScale you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Nokia | ASIK AirScale | 474021A.101; 474021A.102 | Not stated |
| Nokia | Asik Airscale 474021a.102 Firmware | Not specified in the record | Not stated |
| Nokia | Asik Airscale 474021a.101 Firmware | Not specified in the record | 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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.4 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
The bootloader in the Nokia ASIK AirScale system module (versions 474021A.101 and 474021A.102) loads public keys for firmware verification signature. If an attacker modifies the flash contents to corrupt the keys, secure boot could be permanently disabled on a given device.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Assumed-Immutable Data is Stored in Writable Memory
Immutable data, such as a first-stage bootloader, device identifiers, and write-once configuration settings are stored in writable memory that can be re-programmed or updated in the field.
How developers prevent this class of flaw
- Storing immutable code or data in read-only memory (ROM), fuses, or one-time programmable (OTP) memory provides strong integrity guarantees and provides a root of trust for securing the rest of the system.
More Assumed-Immutable Data is Stored in Writable Memory vulnerabilities (CWE-1282)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cisa.gov/uscert/ics/advisories/icsa-22-307-02Third Party Advisory, US Government Resource
Other vulnerabilities in ASIK AirScale
- 7.8 High severity
- 8.8 High severity
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