CyberSecBulletin
CVE-2024-11981NVD status: Deferred

M100: Authentication Bypass Using an Alternate Path or Channel

Published Updated By the CyberSecBulletin desk

CVE-2024-11981 is a high-severity authentication bypass using an alternate path or channel vulnerability in M100 from Billion Electric, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 1.04.1.592.8, 1.04.1.613.13, 1.04.1.675 as the first without the flaw, so updating M100 to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.54% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update M100 to 1.04.1.592.8 or 1.04.1.613.13 or 1.04.1.675, whichever matches your release line, or a later version.
  2. Update M150 to 1.04.1.592.8 or 1.04.1.613.13 or 1.04.1.675, whichever matches your release line, or a later version.
  3. Update M120N to 1.04.1.592.8 or 1.04.1.613.13 or 1.04.1.675, whichever matches your release line, or a later version.
  4. 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
Billion ElectricM1001.04.1.592.* up to, but not including, 1.04.1.592.8; 1.04.1.613.* up to, but not including, 1.04.1.613.13; 1.04.1.* up to, but not including, 1.04.1.675; 1.04.1.* < up to, but not including, 1.04.1.6751.04.1.592.8, 1.04.1.613.13, 1.04.1.675
Billion ElectricM1501.04.1.592.* up to, but not including, 1.04.1.592.8; 1.04.1.613.* up to, but not including, 1.04.1.613.13; 1.04.1.* up to, but not including, 1.04.1.675; 1.04.1.* < up to, but not including, 1.04.1.6751.04.1.592.8, 1.04.1.613.13, 1.04.1.675
Billion ElectricM120N1.04.1.592.* up to, but not including, 1.04.1.592.8; 1.04.1.613.* up to, but not including, 1.04.1.613.13; 1.04.1.* up to, but not including, 1.04.1.675; 1.04.1.* < up to, but not including, 1.04.1.6751.04.1.592.8, 1.04.1.613.13, 1.04.1.675
Billion ElectricM5001.04.1.592.* up to, but not including, 1.04.1.592.8; 1.04.1.613.* up to, but not including, 1.04.1.613.13; 1.04.1.* up to, but not including, 1.04.1.675; 1.04.1.* < up to, but not including, 1.04.1.6751.04.1.592.8, 1.04.1.613.13, 1.04.1.675

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
NoneNothing can be modified.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by CNA (cert.org.tw).

Official description

Certain models of routers from Billion Electric has an Authentication Bypass vulnerability, allowing unautheticated attackers to retrive contents of arbitrary web pages.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Authentication Bypass Using an Alternate Path or Channel

The product requires authentication, but the product has an alternate path or channel that does not require authentication.

How developers prevent this class of flaw

  • Funnel all access through a single choke point to simplify how users can access a resource. For every access, perform a check to determine if the user has permissions to access the resource.

More Authentication Bypass Using an Alternate Path or Channel vulnerabilities (CWE-288)

Timeline

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

References

Other vulnerabilities in M100

All M100 vulnerabilities

Recent Authentication Bypass Using an Alternate Path or Channel vulnerabilities

Spotted an error? Tell us.