CVE intelligence and bounded remediation

CVE-2023-35720 — ASUS RT-AX92U lighttpd mod_webdav.so SQL Injection Information Disclosure Vulnerability

Medium CVSS 6.5

ASUS RT-AX92U lighttpd mod_webdav.so SQL Injection Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected ASUS RT-AX92U routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mod_webdav.so module. When parsing a request, the process does not properly validate a user-supplied string before using it to construct SQL queries. An attacker can leverage this vulnerability to disclose information in the context of root. Was ZDI-CAN-16078.

Severity
Medium
CVSS
6.5 (3.0)
Published
2024-05-03
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-89

Affected products

  • asus / rt-ax92u_firmware / 3.0.0.4.386.46061

Matched remediation archetype

SQL and data-query injection

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Check exposure

  • Trace request, message, file, and stored values into SQL, ORM query fragments, filters, sort expressions, and other data-query languages.
  • Inventory database roles, reachable schemas, multi-tenant boundaries, and whether stacked or administrative operations are enabled.
  • Check both direct queries and second-order use of previously stored values.

Remediate safely

  • Use parameterized queries or safe query builders for all values; map identifiers and operators through explicit allowlists.
  • Remove raw query concatenation and give the application account only the tables and operations it requires.
  • Update affected data-access components and add regression tests for query structure preservation with inert edge-case inputs.

Authoritative sources

Complete CVE record and remediation plan

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