CyberSecBulletin
CVE-2023-0863NVD status: Modified

Terra AC wallbox (UL40/80A): Improper Authentication

Published Updated By the CyberSecBulletin desk

CVE-2023-0863 is a high-severity improper authentication vulnerability in Terra AC wallbox (UL40/80A) from ABB, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected Terra AC wallbox (UL40/80A) versions: 1.0;0 through 1.5.5. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.35% 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 Terra Ac Wallbox Ul40 Firmware to 1.5.6 or a later version.
  2. Update Terra Ac Wallbox 80a Firmware to 1.5.6 or a later version.
  3. Update Terra Ac Wallbox Ul32a Firmware to 1.6.6 or a later version.
  4. Read the advisory on search.abb.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
ABBTerra AC wallbox (UL40/80A)1.0;0 through 1.5.5Not stated
ABBTerra AC wallbox (UL32A)1.0;0 through 1.6.5Not stated
ABBTerra AC wallbox (CE) (Terra AC MID)1.0;0 through 1.6.5Not stated
ABBTerra AC wallbox (CE) Terra AC Juno CE1.0;0 through 1.6.5Not stated
ABBTerra AC wallbox (CE) Terra AC PTB1.0;0 through 1.5.25Not stated
ABBTerra AC wallbox (CE) Symbiosis1.0;0 through 1.2.7Not stated
ABBTerra AC wallbox (JP)1.0;0 through 1.6.5Not stated
ABBTerra Ac Wallbox Ul40 Firmware1.0.0 up to, but not including, 1.5.61.5.6
ABBTerra Ac Wallbox 80a Firmware1.0.0 up to, but not including, 1.5.61.5.6
ABBTerra Ac Wallbox Ul32a Firmware1.0.0 up to, but not including, 1.6.61.6.6
ABBTerra Ac Wallbox Jp Firmware1.0.0 up to, but not including, 1.6.61.6.6
ABBTerra Ac Wallbox Ce Mid Firmware1.0.0 up to, but not including, 1.6.61.6.6
ABBTerra Ac Wallbox Ce Juno Firmware1.0.0 up to, but not including, 1.6.61.6.6
ABBTerra Ac Wallbox Ce Ptb Firmware1.0.0 up to, but not including, 1.5.261.5.26
ABBTerra Ac Wallbox Ce Symbiosis Firmware1.0.0 up to, but not including, 1.2.81.2.8

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
AdjacentThe attacker must be on the same local network segment.
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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.18.8HighCNA (ch.abb.com)
CVSS 3.18.8HighNVD

Official description

Improper Authentication vulnerability in ABB Terra AC wallbox (UL40/80A), ABB Terra AC wallbox (UL32A), ABB Terra AC wallbox (CE) (Terra AC MID), ABB Terra AC wallbox (CE) Terra AC Juno CE, ABB Terra AC wallbox (CE) Terra AC PTB, ABB Terra AC wallbox (CE) Symbiosis, ABB Terra AC wallbox (JP).This issue affects Terra AC wallbox (UL40/80A): from 1.0;0 through 1.5.5; Terra AC wallbox (UL32A) : from 1.0;0 through 1.6.5; Terra AC wallbox (CE) (Terra AC MID): from 1.0;0 through 1.6.5; Terra AC wallbox (CE) Terra AC Juno CE: from 1.0;0 through 1.6.5; Terra AC wallbox (CE) Terra AC PTB : from 1.0;0 through 1.5.25; Terra AC wallbox (CE) Symbiosis: from 1.0;0 through 1.2.7; Terra AC wallbox (JP): from 1.0;0 through 1.6.5.

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: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Improper Authentication vulnerabilities

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