CyberSecBulletin
CVE-2023-27388NVD status: Modified

T&D Corporation and ESPEC MIC CORP. data…: Improper Authentication

Published Updated By the CyberSecBulletin desk

CVE-2023-27388 is a critical-severity improper authentication vulnerability in T&D Corporation and ESPEC MIC CORP. data logger products from T&D Corporation and ESPEC MIC, 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 1.25% chance of exploitation within 30 days, higher than 70% of scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of T&D Corporation and ESPEC MIC CORP. data logger products you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on monitoring.especmic.co.jp for workarounds and exact fixed builds.
  3. 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
T&D Corporation and ESPEC MICT&D Corporation and ESPEC MIC CORP. data logger productsNot specified in the recordNot stated
TanddTr-71w FirmwareNot specified in the recordNot stated
TanddTr-72w FirmwareNot specified in the recordNot stated
TanddRtr-5w FirmwareNot specified in the recordNot stated
TanddWdr-7 FirmwareNot specified in the recordNot stated
TanddWdr-3 FirmwareNot specified in the recordNot stated
TanddWs-2 FirmwareNot specified in the recordNot stated
EspecmicRt-12n FirmwareNot specified in the recordNot stated
EspecmicRs-12n FirmwareNot specified in the recordNot stated
EspecmicRt-22bn FirmwareNot specified in the recordNot stated
EspecmicTeu-12n FirmwareNot specified in the recordNot stated

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 in T&D Corporation and ESPEC MIC CORP. data logger products allows a remote unauthenticated attacker to login to the product as a registered user. Affected products and versions are as follows: T&D Corporation data logger products (TR-71W/72W all firmware versions, RTR-5W all firmware versions, WDR-7 all firmware versions, WDR-3 all firmware versions, and WS-2 all firmware versions), and ESPEC MIC CORP. data logger products (RT-12N/RS-12N all firmware versions, RT-22BN all firmware versions, and TEU-12N all firmware versions).

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 T&D Corporation and ESPEC MIC CORP. data logger products

All T&D Corporation and ESPEC MIC CORP. data logger products vulnerabilities

Recent Improper Authentication vulnerabilities

Spotted an error? Tell us.