CVE-2010-3124 in VLC Media Player
Summary
by MITRE
Untrusted search path vulnerability in bin/winvlc.c in VLC Media Player 1.1.3 and earlier allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse wintab32.dll that is located in the same folder as a .mp3 file.
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Analysis
by VulDB Data Team • 01/21/2025
The vulnerability identified as CVE-2010-3124 represents a critical untrusted search path issue within VLC Media Player version 1.1.3 and earlier implementations. This flaw exists in the bin/winvlc.c component of the media player, creating a dangerous condition where the application fails to properly validate the security context of dynamically loaded libraries. The vulnerability specifically manifests when VLC processes media files and attempts to load system libraries, particularly affecting Windows-based installations where the wintab32.dll library is commonly used for tablet input support. The root cause stems from the application's insecure library loading behavior, which does not properly sanitize the search path before attempting to resolve and load required dynamic link libraries.
The technical exploitation of this vulnerability enables both local and potentially remote attackers to execute arbitrary code through a sophisticated DLL hijacking attack vector. When a user opens a malicious .mp3 file located in a directory containing a crafted Trojan horse wintab32.dll, the VLC player's flawed search path mechanism automatically loads the malicious library instead of the legitimate system library. This occurs because the application searches for required libraries in the same directory as the media file first, before checking system directories, creating a window of opportunity for attackers to place malicious binaries with the same names as legitimate system libraries. The vulnerability is particularly dangerous because it leverages the trust relationship between the media player and system libraries, allowing attackers to execute code with the privileges of the user running VLC.
The operational impact of CVE-2010-3124 extends beyond simple code execution to encompass broader system compromise capabilities. Attackers can leverage this vulnerability to establish persistent backdoors, escalate privileges, or deploy additional malware payloads through the compromised media player. The vulnerability affects a wide range of Windows operating systems and can be exploited across different network scenarios, making it particularly attractive to threat actors seeking to compromise user systems through social engineering attacks. The flaw's presence in a widely used media player like VLC amplifies its potential impact, as users frequently open media files from untrusted sources, creating numerous attack vectors. According to CWE classification, this vulnerability maps to CWE-427 Uncontrolled Search Path Element, which specifically addresses insecure library loading practices that can lead to arbitrary code execution through path manipulation.
Security professionals should implement multiple layers of mitigation strategies to address this vulnerability effectively. The primary recommendation involves updating to VLC Media Player version 1.1.4 or later, where the untrusted search path issue has been resolved through proper library loading mechanisms. System administrators should also consider implementing application whitelisting policies that restrict the execution of unauthorized DLL files and establish strict directory permissions for media player installation directories. Network-based mitigations can include implementing host-based intrusion detection systems that monitor for suspicious library loading patterns and deploying endpoint protection solutions that can detect and prevent DLL hijacking attempts. From an ATT&CK framework perspective, this vulnerability aligns with techniques such as T1059 Command and Scripting Interpreter and T1574 Hijack Execution Flow, demonstrating how attackers can manipulate legitimate system processes to achieve their objectives. The vulnerability also highlights the importance of secure coding practices and proper library loading procedures, emphasizing the need for developers to implement secure search path mechanisms that prioritize system directories over user-controllable locations.