ASIK AirScale: Improper Access Control for Volatile Memory Containing Boot Code
CVE-2022-2484 is a high-severity improper access control for volatile memory containing boot code vulnerability in ASIK AirScale from Nokia, with a CVSS 3.1 base score of 7.8 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. 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 | 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
- 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:L/AC:L/PR:L/UI:N/S:U/C:H/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 | 7.8 | High | NVD |
Official description
The signature check in the Nokia ASIK AirScale system module version 474021A.101 can be bypassed allowing an attacker to run modified firmware. This could result in the execution of a malicious kernel, arbitrary programs, or modified Nokia programs.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Access Control for Volatile Memory Containing Boot Code
The product conducts a secure-boot process that transfers bootloader code from Non-Volatile Memory (NVM) into Volatile Memory (VM), but it does not have sufficient access control or other protections for the Volatile Memory.
How developers prevent this class of flaw
- Ensure that the design of volatile-memory protections is enough to prevent modification from an adversary or untrusted code.
- Test the volatile-memory protections to ensure they are safe from modification or untrusted code.
More Improper Access Control for Volatile Memory Containing Boot Code vulnerabilities (CWE-1274)
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
- 7.1 High severity
- 8.8 High severity
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