CyberSecBulletin
CVE-2023-5246NVD status: Modified

FX0-GMOD00000: Improper Authentication

Published Updated By the CyberSecBulletin desk

CVE-2023-5246 is a high-severity improper authentication vulnerability in FX0-GMOD00000 from SICK, 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. Affected FX0-GMOD00000 versions: vers:all/*. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1% chance of exploitation within 30 days, higher than 63% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of FX0-GMOD00000 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on sick.com 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
SICKFX0-GMOD00000vers:all/*Not stated
SICKFX0-GMOD00010vers:all/*Not stated
SICKFX0-GMOD00030vers:all/*Not stated
SICKFX0-GPNT00000vers:all/*Not stated
SICKFX0-GPNT00010vers:all/*Not stated
SICKFX0-GPNT00030vers:all/*Not stated
SICKFX0-GETC00000vers:all/*; all versionsNot stated
SICKFX0-GETC00010vers:all/*; all versionsNot stated
SICKFX3-GEPR00000vers:all/*; all versionsNot stated
SICKFX3-GEPR00010vers:all/*; all versionsNot stated
SICKFX0-GENT00000vers:all/*Not stated
SICKFX0-GENT00010vers:all/*Not stated
SICKFX0-GENT00030vers:all/*Not stated
Sickfx0-gmod00000_firmwareall versionsNot stated
Sickfx0-gmod00010_firmwareall versionsNot stated
Sickfx0-gmod00030_firmwareall versionsNot stated
Sickfx0-gpnt00000_firmwareall versionsNot stated
Sickfx0-gpnt00010_firmwareall versionsNot stated
Sickfx0-gpnt00030_firmwareall versionsNot stated
Sickfx0-gent00000_firmwareall versionsNot stated
Sickfx0-gent00010_firmwareall versionsNot stated
Sickfx0-gent00030_firmwareall versionsNot stated
SickFx0-get00000 FirmwareNot specified in the recordNot stated
SickFx0-get00010 FirmwareNot specified in the recordNot stated
SickFx0-gepr00000 FirmwareNot specified in the recordNot 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
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.

Scoring systemScoreSeverityScored by
CVSS 3.18.8HighCNA (sick.de)
CVSS 3.18.8HighNVD

Official description

Authentication Bypass by Capture-replay in SICK Flexi Soft Gateways with Partnumbers 1044073, 1127717, 1130282, 1044074, 1121597, 1099832, 1051432, 1127487, 1069070, 1112296, 1044072, 1121596, 1099830 allows an unauthenticated remote attacker to potentially impact the availability, integrity and confidentiality of the gateways via an authentication bypass by capture-replay.

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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