Intel(R) Core(TM) Ultra Processor stream cache…: Improper Isolation of Shared Resources on System-on-a-Chip (SoC)
CVE-2023-42667 is a high-severity improper isolation of shared resources on system-on-a-chip (soc) vulnerability in Intel(R) Core(TM) Ultra Processor stream cache mechanism, 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 Intel(R) Core(TM) Ultra Processor stream cache mechanism versions: See references. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.24% 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
- Update core_ultra_processor to microcode-20240813 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Intel(R) Core(TM) Ultra Processor stream cache mechanism | Intel(R) Core(TM) Ultra Processor stream cache mechanism | See references | Not stated |
| Intel | core_ultra_processor | before microcode-20240813 | microcode-20240813 |
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
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- LowA basic user account is enough.
- 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:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (intel.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.3 | High | CNA (intel.com) |
| CVSS 3.1 | 7.8 | High | CNA (intel.com) |
Official description
Improper isolation in the Intel(R) Core(TM) Ultra Processor stream cache mechanism may allow an authenticated user to potentially enable escalation of privilege via local access.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Isolation of Shared Resources on System-on-a-Chip (SoC)
The System-On-a-Chip (SoC) does not properly isolate shared resources between trusted and untrusted agents.
How developers prevent this class of flaw
- When sharing resources, avoid mixing agents of varying trust levels. Untrusted agents should not share resources with trusted agents.
More Improper Isolation of Shared Resources on System-on-a-Chip (SoC) vulnerabilities (CWE-1189)
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
Recent Improper Isolation of Shared Resources on System-on-a-Chip (SoC) vulnerabilities
- 7.8 High severity
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