NTH-AN00: Improper Verification of Cryptographic Signature
CVE-2023-23431 is a high-severity improper verification of cryptographic signature vulnerability in NTH-AN00 from Honor, 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. The record lists version 7.0.0.157 as the first without the flaw, so updating NTH-AN00 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.12% 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 NTH-AN00 to 7.0.0.157 or a later version.
- Update Nth-an00 Firmware to 7.0.0.157 or a later version.
- Read the advisory on hihonor.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Honor | NTH-AN00 | 7.0.0.138 up to, but not including, 7.0.0.157 | 7.0.0.157 |
| Hihonor | Nth-an00 Firmware | before 7.0.0.157 | 7.0.0.157 |
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 | 7.3 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official description
Some Honor products are affected by signature management vulnerability, successful exploitation could cause the forged system file overwrite the correct system file.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
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
Other vulnerabilities in NTH-AN00
- 7.1 High severity
- 7.1 High severity
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.5 High severity
- 8.8 High severity
- 7.5 High severity
- 7.5 High severity
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