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Supersign Media EditorApplication · Lg

CVE-2023-40517

HIGH · 7.5 CVSS v3.0 Published 2024-05-03
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges 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
LG SuperSign Media Editor ContentRestController getObject Directory Traversal Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of LG SuperSign Media Editor. Authentication is not required to exploit this vulnerability. The specific flaw exists within the getObject method implemented in the ContentRestController class. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM. Was ZDI-CAN-20328.

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

A directory traversal vulnerability exists in the getObject method of ContentRestController in LG SuperSign Media Editor. The method fails to validate user-supplied paths before using them in file operations, allowing unauthenticated remote attackers to access arbitrary files on the system. This results in information disclosure with SYSTEM-level privileges.

MitigationImplement strict input validation and path sanitization on the path parameter in the getObject method - use allowlist validation, normalize paths, and verify paths remain within allowed directories. Apply principle of least privilege to the application service account.

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

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Supersign Media EditorApplication
Affected:= 3.11.3_20171108

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
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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. Locate LG SuperSign Media Editor installation
    Search the system for LG SuperSign Media Editor installation directories or check standard application installation paths
    Affected if The product is present on the system
  2. Determine installed version
    Check version metadata files, about information, or version embedded in application JAR/WAR files - look for exact version string 3.11.3_20171108
    Affected if Installed version equals 3.11.3_20171108 exactly
  3. Verify ContentRestController exists
    Locate the ContentRestController class or WAR/JAR file containing this controller in the application installation
    Affected if ContentRestController with getObject method is present in the deployment
  4. Confirm REST endpoint is exposed
    Check application web configuration, routing definitions, or web.xml to determine if the getObject endpoint is accessible via HTTP/HTTPS
    Affected if The getObject endpoint is exposed and reachable over the network
  5. Check for path validation in getObject
    Inspect the getObject method implementation for input validation on the path parameter - look for absence of path sanitization or allowlist checks
    Affected if The path parameter is used without proper validation allowing directory traversal sequences like ../

The environment is affected if LG SuperSign Media Editor version 3.11.3_20171108 is installed and the ContentRestController getObject endpoint accepts unvalidated path parameters.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict input validation and path sanitization on the path parameter in the getObject method - use allowlist validation, normalize paths, and verify paths remain within allowed directories. Apply principle of least privilege to the application service account.

Fix this in Supersign Media Editor Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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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-2023-40517 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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