Advisory Details

August 24th, 2023

(0Day) LG SuperSign Media Editor ContentRestController getObject Directory Traversal Information Disclosure Vulnerability

ZDI-23-1219
ZDI-CAN-20328

CVE ID CVE-2023-40517
CVSS SCORE 7.5, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS LG
AFFECTED PRODUCTS SuperSign Media Editor
VULNERABILITY DETAILS

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.

ADDITIONAL DETAILS

03/10/23 – The ZDI reported the vulnerability to the vendor.

08/04/23 – The ZDI asked for an update.

08/08/23 – The vendor states that they do not have plans to fix the vulnerability now or in the future.

08/21/23 – The ZDI informed the vendor that we are publishing the case as a zero-day advisory on 08/24/23.

-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the application.


DISCLOSURE TIMELINE
  • 2023-03-10 - Vulnerability reported to vendor
  • 2023-08-24 - Coordinated public release of advisory
CREDIT rgod
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