CVE-2023-31428

Local file disclosure via CLI grep misuse

Published Aug 1, 2023 · Updated Feb 13, 2025

Improper file handling in the CLI of Brocade Fabric OS before 9.1.1c and 9.2.0 allows local users to read files in their home directories. The CLI passes user-selected file input to grep and returns file contents from the user's home directory instead of restricting the operation to safe file types. Exploitation requires authenticated local CLI access, and the reported consequence is file disclosure without file modification or command execution.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper file handling in the CLI of Brocade Fabric OS before 9.1.1c and 9.2.0 allows local users to read files in their home directories. The CLI passes user-selected file input to grep and returns file contents from the user's home directory instead of restricting the operation to safe file types. Exploitation requires authenticated local CLI access, and the reported consequence is file disclosure without file modification or command execution.

The record

CVE
CVE-2023-31428
Published
Aug 1, 2023
Updated
Feb 13, 2025
Vendor
Brocade Communications Systems
Product
Fabric OS
Classifications
CWE-434, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before Brocade Fabric OS v9.1.1c, v9.2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Brocade Communications Systems · Fabric OSversion=before Brocade Fabric OS v9.1.1c, v9.2.0

Published CVSS scores

5.5Brocade Communications SystemsCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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