CyberSecBulletin
CVE-2023-30762NVD status: Modified

KB-AHR series and KB-IRIP series: Improper Authentication

Published Updated By the CyberSecBulletin desk

CVE-2023-30762 is a critical-severity improper authentication 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 0.73% chance of exploitation within 30 days, higher than 55% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Kb-ahr04d Firmware to 91110.1.101106.78 or a later version.
  2. Update Kb-ahr08d Firmware to 91210.1.101106.78 or a later version.
  3. Update Kb-ahr16d Firmware to 91310.1.101106.78 or a later version.
  4. Read the advisory on kbdevice.com for workarounds and exact fixed builds.
  5. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
KbDevice,Inc.KB-AHR series and KB-IRIP seriesNot specified in the recordNot stated
KbdeviceKb-ahr04d Firmwarebefore 91110.1.101106.7891110.1.101106.78
KbdeviceKb-ahr08d Firmwarebefore 91210.1.101106.7891210.1.101106.78
KbdeviceKb-ahr16d Firmwarebefore 91310.1.101106.7891310.1.101106.78
KbdeviceKb-irip04a Firmwarebefore 95110.1.100290.78a95110.1.100290.78a
KbdeviceKb-irip08a Firmwarebefore 95210.1.100290.78a95210.1.100290.78a
KbdeviceKb-irip16a Firmwarebefore 95310.1.100290.78a95310.1.100290.78a

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 systemScoreSeverityScored by
CVSS 3.19.8CriticalNVD
CVSS 3.19.8CriticalCISA (ADP)

Official description

Improper authentication 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 Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

How developers prevent this class of flaw

  • Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

More Improper Authentication vulnerabilities (CWE-287)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in KB-AHR series and KB-IRIP series

All KB-AHR series and KB-IRIP series vulnerabilities

Recent Improper Authentication vulnerabilities

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