u_boot_secondary_program_loader\/spl\/: Improper Preservation of Permissions
CVE-2023-39902 is a high-severity improper preservation of permissions vulnerability in u_boot_secondary_program_loader\/spl\/ from U Boot Secondary Program Loader\/spl\/, 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. The record lists version 2023.07 as the first without the flaw, so updating u_boot_secondary_program_loader\/spl\/ to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.17% 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 u_boot_secondary_program_loader\/spl\/ to 2023.07 or a later version.
- Update Uboot Secondary Program Loader to 2023.07 or a later version.
- Read the advisory on community.nxp.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| U Boot Secondary Program Loader\/spl\/ | u_boot_secondary_program_loader\/spl\/ | before 2023.07 | 2023.07 |
| Nxp | Uboot Secondary Program Loader | before 2023.07 | 2023.07 |
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 | 7.0 | High | CNA (mitre.org) |
| CVSS 3.1 | 7.8 | High | NVD |
Official description
A software vulnerability has been identified in the U-Boot Secondary Program Loader (SPL) before 2023.07 on select NXP i.MX 8M family processors. Under certain conditions, a crafted Flattened Image Tree (FIT) format structure can be used to overwrite SPL memory, allowing unauthenticated software to execute on the target, leading to privilege escalation. This affects i.MX 8M, i.MX 8M Mini, i.MX 8M Nano, and i.MX 8M Plus.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Preservation of Permissions
The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.
More Improper Preservation of Permissions vulnerabilities (CWE-281)
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
Advisories
Other references
- nxp.comProduct
Recent Improper Preservation of Permissions vulnerabilities
- 8.8 High severity
- 7.8 High severity
- 9.8 Critical severity
- 7.2 High severity
- 8.8 High severity
- 8.8 High severity
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