CyberSecBulletin
CVE-2023-27387NVD status: Modified

T&D Corporation and ESPEC MIC CORP. data…: Cross-Site Request Forgery

Published Updated By the CyberSecBulletin desk

CVE-2023-27387 is a high-severity cross-site request forgery 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 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. There is no confirmed exploitation so far. EPSS estimates a 0.45% 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. 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.
  4. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

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
RequiredA user must take an action such as opening a file or link.
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:R/S:U/C:H/I:H/A:H. Scored by NVD.

Official description

Cross-site request forgery (CSRF) in T&D Corporation and ESPEC MIC CORP. data logger products allows a remote unauthenticated attacker to conduct an arbitrary operation by having a logged-in user view a malicious page. 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: Cross-Site Request Forgery

The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

How developers prevent this class of flaw

  • 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, use anti-CSRF packages such as the OWASP CSRFGuard. Another example is the ESAPI Session Management control, which includes a component for CSRF.
  • Ensure that the application is free of cross-site scripting issues (CWE-79), because most CSRF defenses can be bypassed using attacker-controlled script.
  • Generate a unique nonce for each form, place the nonce into the form, and verify the nonce upon receipt of the form. Be sure that the nonce is not predictable (CWE-330).

More Cross-Site Request Forgery vulnerabilities (CWE-352)

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

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 Cross-Site Request Forgery vulnerabilities

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