KB-AHR series and KB-IRIP series: Improper Neutralization of Special Elements used in an OS Command
CVE-2023-30764 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in KB-AHR series and KB-IRIP series from KbDevice,Inc., with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 1.49% chance of exploitation within 30 days, higher than 74% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Kb-ahr04d Firmware to 91110.1.101106.78 or a later version.
- Update Kb-ahr08d Firmware to 91210.1.101106.78 or a later version.
- Update Kb-ahr16d Firmware to 91310.1.101106.78 or a later version.
- Read the advisory on kbdevice.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| KbDevice,Inc. | KB-AHR series and KB-IRIP series | Not specified in the record | Not stated |
| Kbdevice | Kb-ahr04d Firmware | before 91110.1.101106.78 | 91110.1.101106.78 |
| Kbdevice | Kb-ahr08d Firmware | before 91210.1.101106.78 | 91210.1.101106.78 |
| Kbdevice | Kb-ahr16d Firmware | before 91310.1.101106.78 | 91310.1.101106.78 |
| Kbdevice | Kb-irip04a Firmware | before 95110.1.100290.78a | 95110.1.100290.78a |
| Kbdevice | Kb-irip08a Firmware | before 95210.1.100290.78a | 95210.1.100290.78a |
| Kbdevice | Kb-irip16a Firmware | before 95310.1.100290.78a | 95310.1.100290.78a |
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
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 3.1 | 9.8 | Critical | CISA (ADP) |
Official description
OS command injection vulnerability exists in KB-AHR series and KB-IRIP series. If this vulnerability is exploited, an arbitrary OS command may be executed on the product or the device settings may be altered. Affected products and versions are as follows: KB-AHR04D versions prior to 91110.1.101106.78, KB-AHR08D versions prior to 91210.1.101106.78, KB-AHR16D versions prior to 91310.1.101106.78, KB-IRIP04A versions prior to 95110.1.100290.78A, KB-IRIP08A versions prior to 95210.1.100290.78A, and KB-IRIP16A versions prior to 95310.1.100290.78A.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in an OS Command
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
More Improper Neutralization of Special Elements used in an OS Command vulnerabilities (CWE-78)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- jvn.jp/en/vu/JVNVU90812349/Third Party Advisory
Other vulnerabilities in KB-AHR series and KB-IRIP series
- 9.8 Critical severity
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 8.1 High severity
- 7.2 High severity
- 7.8 High severity
- 7.8 High severity
- 8.8 High severity
- 8.8 High severity
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