CyberSecBulletin
CVE-2024-45272NVD status: Modified

mbCONNECT24: Use of Weak Credentials

Published Updated By the CyberSecBulletin desk

CVE-2024-45272 is a high-severity use of weak credentials vulnerability in mbCONNECT24 from MB connect line, 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. Affected mbCONNECT24 versions: 2.16.2 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.62% chance of exploitation within 30 days, higher than 50% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Myrex24 V2 Virtual Server to 2.16.3 or a later version.
  2. Update Rex 200 Firmware to 8.2.1 or a later version.
  3. Update Rex 250 Firmware to 8.2.1 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
MB connect linembCONNECT242.16.2 and earlierNot stated
MB connect linemymbCONNECT242.16.2 and earlierNot stated
HelmholzmyREX24 V22.16.2 and earlierNot stated
HelmholzmyREX24.virtual2.16.2 and earlierNot stated
Mbconnectlinembconnect242.16.2 and earlierNot stated
Mbconnectlinemymbconnect242.16.2 and earlierNot stated
HelmholzMyrex24 V2 Virtual Serverbefore 2.16.32.16.3
HelmholzRex 300 Firmware5.1.11 and earlierNot stated
HelmholzRex 200 Firmwarebefore 8.2.18.2.1
HelmholzRex 250 Firmwarebefore 8.2.18.2.1
MbconnectlineMbspider Mdh 905 Firmware2.6.5 and earlierNot stated
MbconnectlineMbspider Mdh 915 Firmware2.6.5 and earlierNot stated
MbconnectlineMbspider Mdh 906 Firmware2.6.5 and earlierNot stated
MbconnectlineMbspider Mdh 916 Firmware2.6.5 and earlierNot stated
MbconnectlineMbnet Hw1 Firmware5.1.11 and earlierNot stated
MbconnectlineMbnet Firmwarebefore 8.2.18.2.1
MbconnectlineMbnet.rokey Firmwarebefore 8.2.18.2.1

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
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

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

Official description

An unauthenticated remote attacker can perform a brute-force attack on the credentials of the remote service portal with a high chance of success, resulting in connection lost.

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

The underlying weakness: Use of Weak Credentials

The product uses weak credentials (such as a default key or hard-coded password) that can be calculated, derived, reused, or guessed by an attacker.

How developers prevent this class of flaw

  • When the user changes or sets a password, check the password against a database of already compromised or breached passwords. These passwords are likely to be used in password guessing attacks.

More Use of Weak Credentials vulnerabilities (CWE-1391)

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

Third-party and government advisories

Other vulnerabilities in mbCONNECT24

All mbCONNECT24 vulnerabilities

Recent Use of Weak Credentials vulnerabilities

Spotted an error? Tell us.