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Incorrect AuthorizationWeakness · CWE-863

CVE-2024-42013

MEDIUM · 6.4 CVSS v3.1 Published 2025-01-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
66/100
Remediation priority · Elevated
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In GRAU DATA Blocky before 3.1, Blocky-Gui has a Client-Side Enforcement of Server-Side Security vulnerability. An attacker with Windows administrative or debugging privileges can patch a binary in memory or on disk to bypass the password login requirement and gain full access to all functions of the program.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

GRAU DATA Blocky-Gui before version 3.1 contains a Client-Side Enforcement of Server-Side Security vulnerability where authentication logic is enforced on the client side rather than server side. An attacker with Windows administrative or debugging privileges can patch the binary in memory or on disk to bypass the password login requirement, gaining full administrative access to all program functions.

MitigationUpgrade to GRAU DATA Blocky version 3.1 or later which implements proper server-side authentication validation. Restrict administrative and debugging privileges to trusted personnel only.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Blocky-Gui is installed
    Check for Blocky-Gui installation by searching for the executable in common installation directories (e.g., C:\Program Files\GRAU DATA, C:\Program Files (x86)\GRAU DATA) or check the Windows installed programs list via Control Panel or registry at HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Affected if Blocky-Gui is found on the system
  2. Determine installed version
    Right-click the Blocky-Gui executable, select Properties, and check the Version tab, or run the executable with a version flag if available, or inspect the file version info
    Affected if Version is present and is below 3.1
  3. Compare version to affected range
    Compare the found version number to version 3.1 using standard version comparison
    Affected if Installed version is lower than 3.1 (e.g., 3.0.x, 2.x, 1.x)
  4. Verify authentication mechanism (optional deeper check)
    Inspect the application binaries or memory during authentication to confirm client-side validation is occurring - this requires reverse engineering or debugging tools and is optional for basic detection
    Affected if Authentication logic relies on client-side checks without server-side enforcement (present in versions before 3.1)

If Blocky-Gui is installed with a version lower than 3.1, the environment is affected by this client-side authentication bypass vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade to GRAU DATA Blocky version 3.1 or later which implements proper server-side authentication validation. Restrict administrative and debugging privileges to trusted personnel only.

Recommended fix Moderate confidence

GRAU DATA Blocky version 3.1 or later

  1. 1. Identify the current version of GRAU DATA Blocky installed in your environment
  2. 2. Navigate to the official GRAU DATA website (www.graudata.com) or Blocky for Veeam website (www.blockyforveeam.com) to obtain version 3.1 or later
  3. 3. Create a backup of the current Blocky configuration, including any custom settings and data
  4. 4. Uninstall or cleanly remove the existing Blocky installation
  5. 5. Install version 3.1 or later of GRAU DATA Blocky
  6. 6. Restore the backed-up configuration to the new installation
  7. 7. Verify the password authentication is properly enforced server-side and cannot be bypassed by binary patching
  8. 8. Confirm all expected functions of the program are accessible only after successful server-side authentication

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-42013 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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