CyberSecBulletin
CVE-2024-45261NVD status: Analyzed

gl-b3000_firmware: Incorrect Authorization

Published Updated By the CyberSecBulletin desk

CVE-2024-45261 is a high-severity incorrect authorization vulnerability in gl-b3000_firmware from GL.iNet, with a CVSS 3.1 base score of 8.0 out of 10. It can be exploited from the same local network by an attacker with a low-privileged account, without any action from a user. The record lists version 4.5.19 as the first without the flaw, so updating gl-b3000_firmware to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.49% 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 gl-b3000_firmware to 4.5.19 or a later version.
  2. Update gl-mt6000_firmware to 4.6.4 or a later version.
  3. Update gl-x300b_firmware to 4.5.18 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
Gl-inetgl-b3000_firmware4.5.18 up to, but not including, 4.5.194.5.19
Gl-inetgl-mt6000_firmware4.6.2 up to, but not including, 4.6.44.6.4
Gl-inetgl-x300b_firmware4.5.17 up to, but not including, 4.5.184.5.18
Gl-inetgl-xe300_firmware4.4.9 up to, but not including, 4.4.10; 4.3.17 up to, but not including, 4.3.184.4.10, 4.3.18
Gl-inetgl-x750_firmware4.3.18 up to, but not including, 4.3.194.3.19
Gl-inetMt2500 Firmware4.6.2 up to, but not including, 4.6.44.6.4
Gl-inetAxt1800 Firmware4.6.2 up to, but not including, 4.6.44.6.4
Gl-inetAx1800 Firmware4.6.2 up to, but not including, 4.6.44.6.4
Gl-inetB3000 Firmware4.5.18Not stated
Gl-inetA1300 Firmware4.5.17Not stated
Gl-inetX300b Firmware4.5.17Not stated
Gl-inetX3000 Firmware4.4.9Not stated
Gl-inetXe3000 Firmware4.4.9Not stated
Gl-inetX750 Firmware4.3.18Not stated
Gl-inetSft1200 Firmware4.3.18Not stated
Gl-inetMt1300 Firmware4.3.18Not stated
Gl-inetE750 Firmware4.3.17Not stated
Gl-inetXe300 Firmware4.3.17Not stated
Gl-inetAr750 Firmware4.3.17Not stated
Gl-inetAr750s Firmware4.3.17Not stated
Gl-inetAr300m Firmware4.3.17Not stated
Gl-inetMt300n-v2 Firmware4.3.17Not stated
Gl-inetMt3000 Firmware4.6.2Not stated
Gl-inetAr300m16 Firmware4.3.17Not stated
Gl-inetMt6000 Firmware4.6.2Not stated

Version data comes from the organisation that assigned the CVE; 1 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
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:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).

Official description

An issue was discovered on certain GL-iNet devices, including MT6000, MT3000, MT2500, AXT1800, and AX1800 4.6.2. The SID generated for a specific user is not tied to that user itself, which allows other users to potentially use it for authentication. Once an attacker bypasses the application's authentication procedures, they can generate a valid SID, escalate privileges, and gain full control.

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

The underlying weakness: Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

How developers prevent this class of flaw

  • Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
  • Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework and the OWASP ESAPI Access Control feature.

More Incorrect Authorization vulnerabilities (CWE-863)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Technical write-ups (may include proof of concept)

Other vulnerabilities in gl-b3000_firmware

All gl-b3000_firmware vulnerabilities

Recent Incorrect Authorization vulnerabilities

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