CVE-2025-1700 Overview
CVE-2025-1700 is a DLL hijacking vulnerability in the Motorola Software Fix (Rescue and Smart Assistant) installer. A local attacker can place a malicious dynamic-link library in a location searched by the installer. When a user runs the installer, the planted library loads with the installer's privileges, enabling privilege escalation on the host. The flaw is categorized under CWE-427: Uncontrolled Search Path Element and is exploitable only during the installation phase of the software.
Critical Impact
A local user can escalate privileges on a Windows host by planting a malicious DLL that the Motorola Software Fix installer loads during execution.
Affected Products
- Motorola Software Fix (Rescue and Smart Assistant) installer
- See the Motorola Software Fix Installer Vulnerability advisory for affected installer builds
- See the Lenovo Security Advisory LEN-194483 for the parent vendor advisory
Discovery Timeline
- 2025-07-17 - CVE-2025-1700 published to NVD
- 2026-04-15 - Last updated in NVD database
Technical Details for CVE-2025-1700
Vulnerability Analysis
The Motorola Software Fix installer loads one or more DLLs without specifying a fully qualified path. Windows then resolves the DLL using its default search order, which includes the directory from which the installer was launched. An attacker who can write to that directory, such as a Downloads folder or any user-writable path where the installer is staged, can drop a malicious DLL with a matching name. When the user executes the installer, the malicious code runs in the security context of the installer process.
Installers commonly run with elevated rights to write to protected directories and the registry. Code loaded into the installer therefore inherits those elevated rights, producing a local privilege escalation primitive. The attack requires user interaction because the victim must launch the installer.
Root Cause
The root cause is an uncontrolled search path element [CWE-427]. The installer relies on the Windows DLL search order rather than calling libraries with absolute paths or applying safe loading flags such as LOAD_LIBRARY_SEARCH_SYSTEM32. Any directory earlier in the search order than the legitimate library location becomes a viable plant point.
Attack Vector
Exploitation is local and requires the attacker to stage a file before the victim runs the installer. A typical sequence is:
- The attacker writes a malicious DLL with a name expected by the installer into the same directory as the installer binary.
- The victim downloads or launches the installer from that directory.
- The installer loads the planted DLL, executing attacker code with installer privileges.
No verified public proof-of-concept is referenced in the advisories. The vulnerability mechanism is documented in the Motorola and Lenovo advisories.
Detection Methods for CVE-2025-1700
Indicators of Compromise
- Unsigned or unexpected DLL files located alongside the Motorola Software Fix installer binary on user-writable paths.
- Process telemetry showing the installer loading DLLs from Downloads, Temp, or removable media rather than System32 or the installer's protected install directory.
- Child processes spawned by the installer that do not match the vendor's documented installer behavior.
Detection Strategies
- Monitor image-load events for the Motorola Software Fix installer process and alert when modules load from user-writable directories.
- Correlate installer execution with recent file writes of .dll files in the same directory by non-installer processes.
- Validate digital signatures of all DLLs loaded by installer processes and flag unsigned or non-Motorola-signed modules.
Monitoring Recommendations
- Enable Sysmon Event ID 7 (Image Loaded) and forward to your SIEM for installer binaries.
- Track command-line and parent-child process relationships for any execution of the Motorola installer.
- Audit user-writable directories that frequently host downloaded installers for newly created DLLs preceding installer execution.
How to Mitigate CVE-2025-1700
Immediate Actions Required
- Download the Motorola Software Fix installer only from the official Motorola support site and verify the publisher signature before execution.
- Run the installer from a clean, protected directory that does not contain any other downloaded files.
- Restrict local administrative rights so that standard users cannot leverage the installer for privilege escalation.
- Remove older copies of the vulnerable installer from endpoints and shared file stores.
Patch Information
Apply the fixed installer version referenced in the Motorola Software Fix Installer Vulnerability advisory and the Lenovo Security Advisory LEN-194483. Replace any previously downloaded installer binaries with the updated build before running them.
Workarounds
- Execute the installer from an empty directory containing only the verified installer binary.
- Block execution of the vulnerable installer through application control policies such as Windows Defender Application Control or AppLocker until the patched version is deployed.
- Enforce SmartScreen and signature validation policies to prevent execution of unsigned or tampered installer files.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
